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Bài làm
Bài 1 : Tính nhanh
a) 10000 - 47x 7 -47 x 28
= 47x(10000-28)
=47x9972
=468684
b) 54x 47 - 53x 47 - 47
=47x(54-53)-47
=47x1-47
=47-47
=0
c)175 x 1274 - 175 x 273 - 175
=175x(1274-273)-175
=175x1001-175
=175175-175
=175000
# Chúc bạn học tốt #
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A) \(483+17442:57-175\)
\(=483+306-175\)
\(=614\)
B) \(201\times36:54+1087\)
\(=134+1087\)
\(=1221\)
C) \(994-23374:58+576\)
\(=994-403+576\)
\(=1167\)
`@` `\text {Ans}`
`\downarrow`
`483 + 17442 \div 57 - 175`
`= 483 + 306 - 175`
`= 789 - 175`
`= 614`
`B)`
`201 \times 36 \div 54 + 1087`
`= 7236 \div 54 + 1087`
`= 134 + 1087`
`= 1221`
`C)`
`994 - 23374 \div 58 + 576`
`= 994 - 403 + 576`
`= (994+576) - 403`
`= 1570 - 403`
`=`1167`
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 425 x 3475 + 425 x 6525
= 425 x (3475 + 6525)
= 425 x 10000
= 4250000
b) 175 x 1274 - 175 x 273 - 175
= 175 x 1274 - 175 x 273 - 175 x 1
= 175 x (1274 - 273 - 1)
= 175 x 1000
= 175000
![](https://rs.olm.vn/images/avt/0.png?1311)
174 x 1274 - 175 x 273 - 175
= 175 x 1274 - 175 x 273 - 175 x 1
= 175 x ( 1274 - 175 - 273 - 1)
= 175 x 825
=144375
nhớ tick nha
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175 x 1274 - 273 x 7 x 25 - 100 -75
=175 x 1274 - 273 x (7 x 25) - 100 -75
= 175 x 1274 - 273 x 175 - 100 -75
= 175 x (1274 - 273) - 100 - 75
= 175 x 1001 - 100 - 75
= 175175 -100 - 75
= 175000
175*1274-273*7*25-100-75
=175*1274-273*175-175
=175*(1274-273-1)
=175*1000
=175000
![](https://rs.olm.vn/images/avt/0.png?1311)
\(174x1274-175x273-175\)
\(=221676-47775-175\)
\(=173726\)
175 x 54 + 525 x 15 + 175
= 175 x 54 + 175 x (3 x 15) + 175
= 175 x 54 + 175 x 45 + 175
= 175 x (54 + 45 + 1) = 175 x 100 = 17500