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怎样简便就怎样计算.355+260+140+24599×2148×125645-180-24538×99+383500÷14÷517×23-23×1750×25×20×4029×8+12×29+76.
题目详情
怎样简便就怎样计算.
355+260+140+245 99×21 48×125 355+260+140+245 99×21 48×125 645-180-245 38×99+38 3500÷14÷5 645-180-245 38×99+38 3500÷14÷5 17×23-23×17 50×25×20×40 29×8+12×29+76. 17×23-23×17 50×25×20×40 29×8+12×29+76.
355+260+140+245 | 99×21 | 48×125 |
645-180-245 | 38×99+38 | 3500÷14÷5 |
17×23-23×17 | 50×25×20×40 | 29×8+12×29+76. |
355+260+140+245 | 99×21 | 48×125 |
645-180-245 | 38×99+38 | 3500÷14÷5 |
17×23-23×17 | 50×25×20×40 | 29×8+12×29+76. |
▼优质解答
答案和解析
(1)355+260+140+245
=(355+245)+(260+140)
=600+400
=1000
(2)99×21
=(100-1)×21
=100×21-21
=2100-21
=2079
(3)48×125
=6×8×125
=6×(8×125)
=6×1000
=6000
(4)645-180-245
=(645-245)-180
=400-180
=220
(5)38×99+38
=38×(99+1)
=38×100
=3800
(6)3500÷14÷5
=3500÷(14×5)
=3500÷70
=50
(7)17×23-23×17
=17×(23-23)
=17×0
=17
(8)50×25×20×40
=(50×20)×(25×40)
=1000×1000
=1000000
(9)29×8+12×29+76
=29×(8+12)+76
=29×20+76
=580+76
=656
=(355+245)+(260+140)
=600+400
=1000
(2)99×21
=(100-1)×21
=100×21-21
=2100-21
=2079
(3)48×125
=6×8×125
=6×(8×125)
=6×1000
=6000
(4)645-180-245
=(645-245)-180
=400-180
=220
(5)38×99+38
=38×(99+1)
=38×100
=3800
(6)3500÷14÷5
=3500÷(14×5)
=3500÷70
=50
(7)17×23-23×17
=17×(23-23)
=17×0
=17
(8)50×25×20×40
=(50×20)×(25×40)
=1000×1000
=1000000
(9)29×8+12×29+76
=29×(8+12)+76
=29×20+76
=580+76
=656
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