(1.25 0.5 2.5)乘6.4要巧算,最后等于27.2
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解决时间 2021-03-20 11:29
- 提问者网友:沉默的哀伤
- 2021-03-19 16:42
(1.25 0.5 2.5)乘6.4要巧算,最后等于27.2
最佳答案
- 五星知识达人网友:长青诗
- 2021-03-19 17:04
(1.25+0.5+2.5)×6.4
=1.25×6.4+0.5×6.4+2.5×6.4
=1.25×0.8×8+0.5×2×3.2+2.5×0.4×16
=1×8+1×3.2+1×16
=8+3.2+16
=27.2
=1.25×6.4+0.5×6.4+2.5×6.4
=1.25×0.8×8+0.5×2×3.2+2.5×0.4×16
=1×8+1×3.2+1×16
=8+3.2+16
=27.2
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