脱式计算,能简算的要简算.0.125×4.78×80 (0.4+40)×2.5 &nb...
答案:1 悬赏:50 手机版
解决时间 2021-11-16 17:22
- 提问者网友:伴风望海
- 2021-11-15 18:43
脱式计算,能简算的要简算.0.125×4.78×80 (0.4+40)×2.5 &nb...
最佳答案
- 五星知识达人网友:野慌
- 2021-11-15 18:56
(1)0.125×4.78×80
=0.125×80×4.78
=10×4.78
=47.8;
(2)(0.4+40)×2.5
=0.4×2.5+40×2.5
=1+100
=101;
(3)6.9×87+6.9×14-6.9
=6.9×(87+14-1)
=6.9×100
=690.
=0.125×80×4.78
=10×4.78
=47.8;
(2)(0.4+40)×2.5
=0.4×2.5+40×2.5
=1+100
=101;
(3)6.9×87+6.9×14-6.9
=6.9×(87+14-1)
=6.9×100
=690.
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