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Bài tập 110 trang 42 SGK Toán 6 Tập 1

Giải bài 110 tr 42 sách GK Toán lớp 6 Tập 1

Trong phép nhân a . b = c, gọi:

m là số dư của a khi chia cho 9, n là số dư của b khi chia cho 9,

r là số dư của tích m . n khi chia cho 9, d là số dư của c khi chia cho 9.

Điền vào các ô trống rồi so sánh r và d trong mỗi trường hợp sau:

a

78

64

72

b

47

59

21

c

3666

3776

1512

m

6

 

 

n

2

 

 

r

3

 

 

d

3

 

 

ADSENSE

Hướng dẫn giải chi tiết bài 110

a

78

64

72

b

47

59

21

c

3666

3776

1512

m

6

1

0

n

2

5

3

r

3

5

0

d

3

5

0

 

-- Mod Toán 6 HỌC247

 
Nếu bạn thấy hướng dẫn giải Bài tập 110 trang 42 SGK Toán 6 Tập 1 HAY thì click chia sẻ 
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    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\(\left(2x-3\right)^2=\left(2x-3\right)\left(x+1\right)\)

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  • 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 \(A=\dfrac{1}{2}\)

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  • Trịnh Lan Trinh

    Tìm GTNN của

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

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  • 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

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