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能简算就简算:10.24÷1.25÷8126.5×0.25×408.8×(12.5×9.9)3.79×78+5.21×78+785÷1.84.2÷3.5930÷0.6÷563.4÷2.5÷0.44.9÷1.43.9÷(1.3×5)(7.7+1.54)÷0.72.5×2.42.7÷45
题目详情
能简算就简算: 10.24÷1.25÷8 | 126.5×0.25×40 | 8.8×(12.5×9.9) |
3.79×78+5.21×78+78 | 5÷1.8 | 4.2÷3.5 |
930÷0.6÷5 | 63.4÷2.5÷0.4 | 4.9÷1.4 |
3.9÷(1.3×5) | (7.7+1.54)÷0.7 | 2.5×2.4 |
2.7÷45 |
▼优质解答
答案和解析
(1)10.24÷1.25÷8
=10.24÷(1.25×8)
=10.24÷10
=1.024
(2)126.5×0.25×40
=126.5×(0.25×40)
=126.5×10
=1265
(3)8.8×(12.5×9.9)
=8.8×12.5×9.9
=110×(10-0.1)
=110×10-11
=1089
(4)3.79×78+5.21×78+78
=(3.79+5.21+1)×78
=10×78
=780;
(5)5÷1.8=2.
(6)4.2÷3.5
=4.2÷0.7÷5
=6÷5
=1.2
(7)930÷0.6÷5
=930÷(0.6×5)
=930÷3
=310
(8)63.4÷2.5÷0.4
=63.4÷(2.5×0.4)
=63.4÷1
=63.4
(9)4.9÷1.4
=4.9÷7÷0.2
=0.7÷0.2
=3.5
(10)3.9÷(1.3×5)
=3.9÷1.3÷5
=3÷5
=0.6
(11)(7.7+1.54)÷0.7
=7.7÷0.7+1.54÷0.7
=11+2.2
=13.2
(12)2.5×2.4
=2.5×4×0.6
=10×0.6
=6
(13)2.7÷45
=2.7÷9÷5
=0.3÷5
=0.06
=10.24÷(1.25×8)
=10.24÷10
=1.024
(2)126.5×0.25×40
=126.5×(0.25×40)
=126.5×10
=1265
(3)8.8×(12.5×9.9)
=8.8×12.5×9.9
=110×(10-0.1)
=110×10-11
=1089
(4)3.79×78+5.21×78+78
=(3.79+5.21+1)×78
=10×78
=780;
(5)5÷1.8=2.
• |
7 |
(6)4.2÷3.5
=4.2÷0.7÷5
=6÷5
=1.2
(7)930÷0.6÷5
=930÷(0.6×5)
=930÷3
=310
(8)63.4÷2.5÷0.4
=63.4÷(2.5×0.4)
=63.4÷1
=63.4
(9)4.9÷1.4
=4.9÷7÷0.2
=0.7÷0.2
=3.5
(10)3.9÷(1.3×5)
=3.9÷1.3÷5
=3÷5
=0.6
(11)(7.7+1.54)÷0.7
=7.7÷0.7+1.54÷0.7
=11+2.2
=13.2
(12)2.5×2.4
=2.5×4×0.6
=10×0.6
=6
(13)2.7÷45
=2.7÷9÷5
=0.3÷5
=0.06
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