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# Tính 4.25-3.(24-9)

Câu 1:Tính

a 4.52-3.(24-9)

b 7+6.(1https:https:https://hoc247.net/image/faq/data2/710107_.https://hoc247.net/image/faq/data2/710107_.hoc247.nethttps://hoc247.net/image/faq/data2/710107_.imagehttps://hoc247.net/image/faq/data2/710107_.faqhttps://hoc247.net/image/faq/data2/710107_.data2https://hoc247.net/image/faq/data2/710107_.185200_.https:https://hoc247.net/image/faq/data2/710107_.https://hoc247.net/image/faq/data2/710107_.hoc247.nethttps://hoc247.net/image/faq/data2/710107_.imagehttps://hoc247.net/image/faq/data2/710107_.faqhttps://hoc247.net/image/faq/data2/710107_.data2https://hoc247.net/image/faq/data2/710107_.185200_.hoc247.nethttps:https://hoc247.net/image/faq/data2/710107_.https://hoc247.net/image/faq/data2/710107_.hoc247.nethttps://hoc247.net/image/faq/data2/710107_.imagehttps://hoc247.net/image/faq/data2/710107_.faqhttps://hoc247.net/image/faq/data2/710107_.data2https://hoc247.net/image/faq/data2/710107_.185200_.imagehttps:https://hoc247.net/image/faq/data2/710107_.https://hoc247.net/image/faq/data2/710107_.hoc247.nethttps://hoc247.net/image/faq/data2/710107_.imagehttps://hoc247.net/image/faq/data2/710107_.faqhttps://hoc247.net/image/faq/data2/710107_.data2https://hoc247.net/image/faq/data2/710107_.185200_.faqhttps:https://hoc247.net/image/faq/data2/710107_.https://hoc247.net/image/faq/data2/710107_.hoc247.nethttps://hoc247.net/image/faq/data2/710107_.imagehttps://hoc247.net/image/faq/data2/710107_.faqhttps://hoc247.net/image/faq/data2/710107_.data2https://hoc247.net/image/faq/data2/710107_.185200_.data2https:https://hoc247.net/image/faq/data2/710107_.https://hoc247.net/image/faq/data2/710107_.hoc247.nethttps://hoc247.net/image/faq/data2/710107_.imagehttps://hoc247.net/image/faq/data2/710107_.faqhttps://hoc247.net/image/faq/data2/710107_.data2https://hoc247.net/image/faq/data2/710107_.185200_.775362_.2)2

c 25.7+25

Câu 2:Tìm x

a (x-15):5+22=24

b |x+7|=15-(-4)

c 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Câu 3:

1)Cho A= 1-2+3-4+5-6+...+99-100

a Tính A

b A có chia hết cho 2,3 và 5 không?

c A có bao nhiêu ước tụ nhiên? bao nhiêu ước nguyên?

2)Thay a,b bàng các chữ số thích ợp sao cho:24a68b chia hết cho 45

3)Cho a là một số nguyen có dạng a=3b+7(b thuộc Z)

Hỏi a có thể nhận được những giá trị nào?tại sao?

a=11 a=2002 a=2003 a=11570 a=22789 a=29563 a=299537

Câu 4:

a Tìm số tự nhiên nhỏ nhất sao cho số đó chia 9 dư 5 chia 7 dư 4 chia 5 dư 3

b Cho A=1+20122+20123+...+201272

B=201273-1

So sánh A với B

Theo dõi Vi phạm
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## Trả lời (2)

• a, 4.25-3.(24-9)=100-3.(24-9)=77.15=1155

b,7+6.(1\4)=13.1\4=13\4

c,32.7+32=224+32=256

câu 2

(x-15):5+22=24

(x-15):5=24-22

(x-15):5=2

(x-15)=5.2

(x-15)=10

x=10+15

x=25

|x+7|=15-(-4)

|x+7|=19

x=19-7

x=12

(x-1\2):1\3+5\7=68\7

(x-1\2):1\3=68\7-5\7

(x-1\2):1\3=9

(x-1\2)=9.1\3

(x-1\2)=3

x=3+1\2

x=7\2

19/12/2018
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19/12/2018
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