用递等式计算(怎样简便就怎样计算).5.6×0.85×7.8 4.32×99+4.32 99×3.74...
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解决时间 2021-01-07 17:24
- 提问者网友:却不属于对方
- 2021-01-07 10:02
用递等式计算(怎样简便就怎样计算).5.6×0.85×7.8 4.32×99+4.32 99×3.74...
最佳答案
- 五星知识达人网友:千夜
- 2021-01-07 11:13
(1)5.6×0.85×7.8
=4.76×7.8
=37.128;
(2)4.32×99+4.32
=4.32×(99+1)
=4.32×100
=432;
(3)99×3.74
=(100-1)×3.74
=100×3.74-3.74
=374-3.74
=370.6;
(4)1.25×3.2×0.25
=1.25×8×0.4×0.25
=(1.25×8)×(0.4×0.25)
=10×0.1
=1;
(5)1.2×2.6+3×4.25
=33.12+12.75
=45.87;
(6)1.25×7.2
=1.25×8×0.9
=(1.25×8)×0.9
=10×0.9
=9.
=4.76×7.8
=37.128;
(2)4.32×99+4.32
=4.32×(99+1)
=4.32×100
=432;
(3)99×3.74
=(100-1)×3.74
=100×3.74-3.74
=374-3.74
=370.6;
(4)1.25×3.2×0.25
=1.25×8×0.4×0.25
=(1.25×8)×(0.4×0.25)
=10×0.1
=1;
(5)1.2×2.6+3×4.25
=33.12+12.75
=45.87;
(6)1.25×7.2
=1.25×8×0.9
=(1.25×8)×0.9
=10×0.9
=9.
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