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Bài tập 109 trang 42 SGK Toán 6 Tập 1

Giải bài 109 tr 42 sách GK Toán lớp 6 Tập 1

Gọi m là số dư của a khi chia cho 9. Điền vào các ô trống:

  a  

16     

213   

  827

   468

m

 

 

 

 

ADSENSE

Hướng dẫn giải chi tiết bài 109

 
 

  a  

16     

213   

  827

   468

m

 6

 0

-- Mod Toán 6 HỌC247

 
Nếu bạn thấy hướng dẫn giải Bài tập 109 trang 42 SGK Toán 6 Tập 1 HAY thì click chia sẻ 
YOMEDIA
  • Nguyễn Trà Long

    Chứng minh rằng:

    5^200+5^199+5^198 chia hết cho 31

    Theo dõi (0) 1 Trả lời
  •  
     
    Nguyễn Anh Hưng

    1,Thực hiện phép tính:

    1 - 2 + 3 - 4 + 5 - 6 + ..........+2011 - 2012

    Theo dõi (0) 1 Trả lời
  • thuy tien

    Bài 1 khi chia a cho 9 có số dư là 6 . Hỏi a có chia hết cho 3 ko? Cho 9 ko?

    bài 2:Số 65 - 92 có chia hết cho 3k ko? ( lưu ý trên 3k có dấu gạch ngang)

    Theo dõi (0) 1 Trả lời
  • Nguyen Ngoc

    Tìm N để (3N+1) (N-1)

    Đang gấp đúng mình tick cho

    Theo dõi (0) 1 Trả lời
  • Lê Viết Khánh

    Thay dấu * bởi chữ số thích hợp để số 59*

    a. Chia hêt cho 2

    b. chia hết cho 5

    c. chia hết cho cả 2 và 5

    d. Ko chia hết cho cả 2 và 5

    e. Chia hết cho 3 và ko chia hết cho 9

    g. Chia hết cho 9

    Theo dõi (0) 1 Trả lời
  • bach dang

    Chứng minh rằng A\(⋮\)7

    A=\(2^1+2^2+2^3+2^4+.....+2^{59}+2^{60}\)

    Theo dõi (0) 1 Trả lời
  • Mai Trang

    2. a) Tìm n thuộc N để n^5+1 chia hết cho n^3+1

    b) Tìm n thuộc Z để n^5+1 chia hết cho n^3+1

    3. Tìm số nguyên n sao cho:

    a) n^2+2n-4 chia hết cho 11

    b) 2n^3+n^2+7n+1chia hết cho 2n-1

    c) n^4-2n^3+2n^2-2n+1 chia hết cho n^4-1

    d) n^3-n^2+2n+7 chia hết cho n^2+1

    Theo dõi (0) 1 Trả lời
  • Lê Tấn Thanh

    Cho biểu thức :

    A = \(\dfrac{1+5+5^2+..........+5^9}{1+5+5^2+............+5^8}\)

    B = \(\dfrac{1+3+3^2+............+3^9}{1+3+3^2+............+3^8}\)

    Giúp mình nhanh với .

    Theo dõi (0) 2 Trả lời
  • Nguyễn Bảo Trâm

    Tìm x \(\in\)N

    a) x + ( x + 1 ) + ( x + 2 ) + .....+ ( x + 30 ) = 1240

    b) 1 + 2 + 3 +........+ x = 210

    Theo dõi (0) 3 Trả lời
  • ngọc trang

    Thực hiện các phép tính sau bằng cách hợp lí nhất:

    a) 19 + 19 + 19 +.......... + 19 + 77 + 77 + 77 +........+ 77

    ( 23 số hạng 19) ( 19 số hạng 77 )

    b) 1000! . ( 456 . 789789 - 789 . 456456 )

    Theo dõi (0) 1 Trả lời
  • hà trang

    1. Bỏ dấu ngoặc rồi thu gọn biểu thức:

    a)A=(a+b)-(a-b)+(a-c)-(a+c)

    Theo dõi (0) 1 Trả lời
  • Mai Rừng

    Học kì 2, lớp 6A dự định bỏ tiền heo đất để ăn liên hoan cuối năm. Mỗi ngày lớp bỏ 40.000 đồng. Nếu lớp bắt đầu bỏ từ tháng 1 đến tháng 4 lớp sẽ được bao nhiêu tiền. (Giả sử trung bình mỗi tháng có 30 ngày)

    Theo dõi (0) 1 Trả lời
  • Lê Minh Bảo Bảo

    Tìm n, biết

    \(n^2+5⋮n+1\)

    Theo dõi (0) 1 Trả lời
  • Duy Quang

    Cho 894a2b chia hết cho tất cả các số 2, 3, 5, 6, 9, 15

    Theo dõi (0) 2 Trả lời
  • Thanh Truc

    Tim x biet

    \(\left(2x-1\right)^2-2=30\)

    Theo dõi (0) 1 Trả lời
  • Thanh Truc

    Một người đi xe đạp từ A đến B tron g một thời gian qui định và với vận tốc xác định . Nếu người tăng vận tốc 3 km/h thì sẽ đến sớm 1h . Nếu người đó giảm vận tốc 2km/h thì đến B muộn 1h . Tính khoảng cách AB , vận tốc và thời gian đi của người đó .

    Theo dõi (0) 2 Trả lời
  • Hoa Lan

    Đề bài: Phân tích đa thức thành nhân tử: x^2 -y^2 + 6xy + 9.

    Theo dõi (0) 2 Trả lời
  • ngọc trang

    Cho 0<a≤b≤c .chứng minh rằng

    \(\dfrac{a}{b}+\dfrac{b}{c}+\dfrac{c}{a}\)\(\dfrac{b}{a}+\dfrac{c}{b}+\dfrac{a}{c}\)

    Theo dõi (0) 2 Trả lời
  • Lê Minh Trí

    bài 1: một bác thợ lập kế hoạch lập một số sản phẩm, theo đó mỗi ngày bác phải làm 10 sản phẩm. Do cải tiến kĩ thuật nên bác làm được 14 sản phẩm mỗi ngày . Vì vậy, không nhữg hoàn thành xong trước 2 ngày so với kế hoạch mà còn thêm được 12 sản phẩm.

    Hỏi theo kế hoạch tổng số sản phẩm mà bác thợ phải làm là bao nhiêu?

    giúp mình nhá! mình cần gấp.

    Theo dõi (0) 2 Trả lời
  • thu hảo

    Rút gọn:

    \(a\left(b+c-a\right)^2+b\left(c+a-b\right)^2+c\left(a+b-c\right)^2+\left(b+c-a\right)\left(c+a-b\right)\left(a+b-c\right)\)

    lưu ý đg có làm kiểu integral integral integral_(a^2 + b^2 + c^2<R^2) 4 a b c da db dc = 0 hay là a^2 b + a^2 c + a b^2 + 6 a b c + a c^2 + b^2 c + b c^2 rồi rút gọn nha mấy bn có cái háng ngồi không :)

    mà k làm đc thì cho lên câu hỏi hay giùm mk nha ace CTV :3

    lẹ nha tối nay thôi T.T

    Theo dõi (0) 2 Trả lời
  • Lê Nguyễn Hạ Anh

    một xe ô tô dự định đi từ A đến B với vận tốc 48km/h . sau khi đi được 1 h thì xe bị hỏng phải dừng lại sửa 15 phút . do đó để đến B đúng h dự định ô tô phải tăng vận tốc thêm 6km/h. tính quãng đường AB?

    Theo dõi (0) 2 Trả lời
  • Chai Chai

    cho a, b là 2 số dương . Chứng minh rằng:

    \(\left(1+\dfrac{a}{b}\right)^5+\left(1+\dfrac{b}{a}\right)^5\) ≥ 64

    Theo dõi (0) 2 Trả lời
  • minh thuận

    Tìm min 2x2+y2-2x-4y+2018-2xy

    Theo dõi (0) 2 Trả lời
  • Quế Anh

    Tìm GTLN:

    a) A=-x2 +6x -5

    b) B=-x2-3x+4

    c) C=-3x2+2x -1

    d) D=ax2 + bx + c ( với a<0 ,abc là hằng số )

    Theo dõi (0) 2 Trả lời
  • Duy Quang

    Cho biểu thức A =\(\dfrac{x+2}{x+3}\) - \(\dfrac{5}{x^2+x-6}\) + \(\dfrac{1}{2-x}\)

    a, Tìm điều kiện của x để A có nghĩa

    b, Rút gọn A

    c, Tìm x để A=-3/4

    d, Tìm x để biểu thức A có giá trị nguyên

    e, Tính giá trị của biểu thức A khi x2-9=0

    Theo dõi (0) 2 Trả lời
  • Thanh Nguyên

    A=\(2^1+2^2+2^3+...+2^{59}+2^{60}\)

    CMR : A⋮7

    Theo dõi (0) 1 Trả lời
  • Lê Minh Trí

    giải phương trình

    \(\dfrac{x}{2\left(x-3\right)}+\dfrac{x}{2\left(x+1\right)}=\dfrac{2x}{\left(x+1\right)\left(x-3\right)}\)

    Theo dõi (0) 2 Trả lời
  • A La

    Phân tích đa thức sau thành nhân tử : A=(a+1)(a+3)(a+5)(a+7)+15

    Theo dõi (0) 2 Trả lời
  • cuc trang

    Tìm x,biết:

    \(8\times6+288:\left(x-3\right)^2=50\\ \)

    Theo dõi (0) 1 Trả lời
  • Lê Gia Bảo

    1. Cho biểu thức M =2/n-1 (n khác 1). Tìm tất cả các số nguyên n để M có giá trị là số nguyên.

    Theo dõi (0) 1 Trả lời
  • Co Nan

    x2-4x+4=x-2 giải phương trình

    Theo dõi (0) 1 Trả lời
  • Nguyễn Lê Tín

    a) Tìm giá trị nhỏ nhất: A= 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  • con cai

    Cho a, b, c thỏa mãn: \(\dfrac{1}{a}+\dfrac{1}{b}+\dfrac{1}{c}=0\)

    Tính giá trị biểu thức: A=\(\dfrac{b+c}{a}+\dfrac{c+a}{b}\dfrac{a+b}{c}\)

    Theo dõi (0) 1 Trả lời
  • Mai Thuy

    Cho a+b+c= 1, chứng minh rằng: a2+b2+c2\(\ge\)\(\dfrac{1}{3}\)

    Theo dõi (0) 1 Trả lời
  • Hoa Lan

    Cho 3 số a,b,c thỏa mãn a+b+c=2.Tìm giá trị nhỏ nhất của biểu thức: \(A=a^2+b^2+c^2\)

    Theo dõi (0) 1 Trả lời
  • Choco Choco

    Cho a,b,c là số đo ba cạnh của tam giác

    Chứng minh rằng \(1< \dfrac{a}{b+c}+\dfrac{b}{c+a}+\dfrac{c}{a+b}< 2\)

    Theo dõi (0) 1 Trả lời
  • Kim Ngan

    Tìm x để biểu thức A=3x2−8x+6x2−2x+13x2−8x+6x2−2x+1đạt giá trị nhỏ nhất. Tính giá trị nhỏ nhất đó.

    làm giùm mk nka mk sắp thi òi!!!!!!!!!!!ohokhocroi

    Theo dõi (0) 1 Trả lời
  • Anh Trần

    Tìm x để biểu thức A=\(\dfrac{3x^2-8x+6}{x^2-2x+1}\)đạt giá trị nhỏ nhất. Tính giá trị nhỏ nhất đó.

    làm giùm mk nka mk sắp thi òi!!!!!!!!!!!ohokhocroi

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  • het roi

    Giải các BPT sau :

    a) 2x - 3 / 35 + x (x - 2) / 7 < x2 / 7 - 2x - 3 / 5

    b) 3x - 2 / 4 < 3x + 3 / 6

    Theo dõi (0) 1 Trả lời
  • Quế Anh

    So sánh: \(\sqrt{1969}\)+\(\sqrt{1971}\) và 2\(\sqrt{1970}\)

    Theo dõi (0) 1 Trả lời
  • Đào Lê Hương Quỳnh

    mình nhờ các bạn giải hộ vài bài với, mình xin cảm ơn rất nhiều

    1. Giải phương trình

    a) (x+5)(2x+1) - x2 + 25 = 0

    b 3x/x-2 - x/x-5 + 3x/(x-2)(x-5) = 0

    2 cho phương trình ẩn x

    x+1/x+2+m = x+1/x+2-m

    a) giải phương trình khi m = -3

    b) tìm các giá trị m sao cho phương trình nhận x=3 làm nghiệm

    Theo dõi (0) 1 Trả lời
  • Phan Thiện Hải

    Cho tam giác ABD vuông tại B, có AB= 6cm, AD= 10 cm. Trên cạnh AD lấy điểm C sao cho AC= AB

    Cm: BC là tia phân giác của góc EBD

    Theo dõi (0) 1 Trả lời
  • Kim Ngan

    Cho A=\(\dfrac{x-5}{2x+1}\). Tìm \(\in\)Z để A nguyên.

    Theo dõi (0) 1 Trả lời
  • Nguyễn Hiền

    Giải BPT

    3x - 2 / 4 > 3x + 3 / 6

    Theo dõi (0) 1 Trả lời
  • Nguyễn Thị Thanh

    Tìm giá trị nhỏ nhất của biểu thức A=\(\dfrac{-5}{x^2-2x+3}\)

    hiha

    Theo dõi (0) 1 Trả lời
  • Trần Hoàng Mai

    Giải phương trình sau:

    |2x—5|+|1—3x|+|x|=7

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  • Xuan Xuan

    Một xe máy đi từ A đến B dài 35km. Lúc về đi bằng đường khác dài 42km với vận tốc kém hơn lượt đi là 6km/h. Tinh vận tốc lượt đi, lượt về, biết thời gian về bằng 2/3 thời gian đi..

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  • hai trieu

    Lúc 6h sáng, một xe máy khởi hành từ A đến V. Sau đó 1h, một ôtô cũng xuất phát từ A đến B với vận tốc trung bình lớn hơn vận tốc của xe máy 20km/h. Cả 2 xe đến B đồng thời lúc 9h30' sáng cùng ngày. Tính độ dài quãng đường AB, và vận tốc trung bình của xe máy

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  • thu thủy

    Cho 2 số x,y thoả mãn điều kiện 3x+y=1. Tìm GTNN của biểu thức M= 3x^2 + y^2

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  • Dương  Quá

    giai pt này giùm mik đê:\(\dfrac{2x-5}{x-2}-\dfrac{3x-5}{x-1}=-1\)

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  • hoàng duy

    1/ cho 3 số tự nhiên a, b ,c thỏa mãn a+b+c=2. tìm giá trị nhỏ nhất của biểu thức:

    A= a2 + b2 + c2 =0

    giúp mk với

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  • Phan Thiện Hải

    Bài 1: Một ô tô dự định đi từ A đến B với vận tốc 48km/h. Sau khi đi được 1 giờ thì xe bị hỏng phải dừng lại sửa 15 phút. Do đó để đến B đúng giờ dự định ô tô phải tăng tốc thêm 6km/h. Tính quăng đường AB

    Bài 2: Một ca nô xuôi dòng từ A đến B hết 1h 20 phút và ngược dòng hết 2h. Biết vận tốc dòng nước là 3km/h. tính vận tốc riêng của ca nô

    Bài 3: Một tổ sản xuất theo kế hoạch mỗi ngày phải sản xuất 50 sản phẩm. Khi thực hiện tổ đã sản xuất được 57 sản phẩm một ngày. Do đó đã hoàn thành trước kế hoạch 1 ngày và còn vượt mức 13 sản phẩm. Hỏi theo kể hoạch tổ phải sản xuất bao nhiêu sản phẩm

    Bài 4: Số học sinh giỏi lớp 8/1 bằng 3/4 số học sinh khá và nhiều hơn học sinh trung bình là 5 học sinh? Biết lớp có 40 học sinh gồm giỏi khá trung bình. Tinh số học sinh giỏi khá trung bình

    Bài 5: Trong tháng Giêng hai tổ công nhân may đc 800 chiếc áo. Tháng 2 tổ 1 vượt mức 15%, tổ 2 vượt mức 20% do đó cả hai tổ sản xuất được 945 cái áo. Tính xem trong tháng đầu mỗi tổ may được bao nhiêu cái áo

    Bài 6: Hai lớp 8A và 8B có tổng cộng 94 học sinh biết rằng 25% số học sinh 8A đạt loại giỏi, 20% số học sinh 8B và tổng số học sinh giỏi hai lớp là 21 học sinh. Tinh số học sinh mỗi lớp

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  • Nguyễn Thủy Tiên

    Chứng minh rằng:

    a, \(a^2\)+\(b^2-2ab\ge0\)

    b,\(\dfrac{a^2+b^2}{2}\ge ab\)

    c,\(a\left(a+2\right)< \left(a+1\right)^2\)

    d,\(m^2+n^2+2\ge2\left(m+n\right)\)

    e, \(\left(a+b\right)\left(\dfrac{1}{a}+\dfrac{1}{b}\right)\ge4\)(với a > 0, b > 0)

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  • Phan Thị Trinh

    Cho a,b,c là các số thực dương thỏa mãn \(a+b+c=1\)

    chứng minh rằng \(\dfrac{ab+c}{c+1}+\dfrac{bc+a}{a+1}+\dfrac{ac+b}{b+1}\le1\)

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  • Co Nan

    Cho 3 số a,b,c thỏa mãn \(a+b+c=2017\)\(\dfrac{1}{a}+\dfrac{1}{b}+\dfrac{1}{c}=\dfrac{1}{2017}\)

    Chứng minh rằng ít nhất một trong ba số a,b,c bằng 2017

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  • Lan Anh

    Chứng minh với mọi số x thì:

    a, căn của 3x2 + 6x + 12 cộng căn của 5x4 - 10x2 + 9 lớn hơn hoặc bằng 5

    b, căn của 3x2 + 6x + 12 cộng căn của 5x4 - 10x2 + 9 bằng 3 - 4x - 2x2

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  • Bánh Mì

    Giải phương trình

    a, \(x^4+3x^3+4x^2+3x+1=0\)

    b, \(x^6-x^5+x^4-x^3+x^2-x+\dfrac{3}{4}=0\)

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  • thu thủy

    cho a+b+c=1; a, b, c >0 .

    tìm Mmin=1/a+1/b+1/c

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  • Phạm Khánh Linh

    Một ô tô dự định đi từ A - B với vận tốc 40km/h. Lúc đầu đi với vận đó , khi còn 60km nữa được nửa đường thì người lái xe tăng tốc thêm 10km/h nên đã đến B sớm hơn dự định 1h. Tính quãng đường AB

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  • thu phương

    cho phương trình ẩn x sau ( 2x+m)(x-1)-2\((x)^{2}\)+mx+m-2=0

    tìm các giá trị của m để phương trình có nhgiệm là một số không âm

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  • minh vương

    Cho a,b,c>0 và a×b×c=1. Tìm GTNN của bt sau:

    P=(a+1)(b+1)(c+1)

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  • thúy ngọc

    \(A=\left(\dfrac{x}{x^2-4}+\dfrac{2}{2-x}+\dfrac{1}{x+2}\right):\left(x-2+\dfrac{10-x^2}{x+2}\right)\)
    a)Rút gọn
    b) Tính giá trị x để A < 0

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  • Thùy Trang

    Tìm GTNN của bt:

    A= x2-7x+11

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  • Mai Trang

    Câu 1: a, Một người đi bộ từ A đến B với vận tốc 8km/h. Lúc về người đó đi với vận tốc 10km/h nên thời gian về ít hơn thời gian đi là 30 phút. Tính quãng đường AB.

    b, giải bất phương trình sau và biểu diễn tập nghiệm trên trục số.

    \(\dfrac{12x+1}{12}>=\dfrac{9x+3}{3}-\dfrac{8x+1}{4}\)

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  • Đặng Ngọc Trâm

    Tính\(\left(2x-3\right)^2=\left(2x-3\right)\left(x+1\right)\)

    Theo dõi (0) 1 Trả lời
  • thanh hằng

    Cho biểu thức :
    \(A=\dfrac{3x+15}{x^2-9}+\dfrac{1}{x+3}-\dfrac{2}{x-3 }\)
    a) rút gọn A
    b) Tìm x để \(A=\dfrac{1}{2}\)

    Theo dõi (0) 1 Trả lời
  • Trịnh Lan Trinh

    Tìm GTNN của

    B=\(5-\dfrac{\left(X+19\right)^2-325}{3\left(x+1\right)^2+6}\)

    Theo dõi (0) 1 Trả lời
  • minh dương

    Cho phương trình

    (2x+m) (x-1)-2x^2+2m-2=0 ( x là ẩn, m là hằng số cho trước)

    Tìm các giá trị của m để phương trinh có nghiệm là một số không âm.

    Help me! Tớ cần gấp! Thank you very much!

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  • Nguyễn Thanh Thảo

    Tìm nghiệm nguyên của phương trình:

    a) xy-2x-3y+1=0

    b) x^2-y^2=2002

    Theo dõi (0) 1 Trả lời

 

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