请问3.6×2.8-0.4×3.6+2.4×6.4能巧算吗?怎么巧算?
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![请问3.6×2.8-0.4×3.6+2.4×6.4能巧算吗?怎么巧算?](/uploads/image/z/758914-34-4.jpg?t=%E8%AF%B7%E9%97%AE3.6%C3%972.8-0.4%C3%973.6%2B2.4%C3%976.4%E8%83%BD%E5%B7%A7%E7%AE%97%E5%90%97%3F%E6%80%8E%E4%B9%88%E5%B7%A7%E7%AE%97%3F)
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请问3.6×2.8-0.4×3.6+2.4×6.4能巧算吗?怎么巧算?
请问3.6×2.8-0.4×3.6+2.4×6.4能巧算吗?
怎么巧算?
请问3.6×2.8-0.4×3.6+2.4×6.4能巧算吗?怎么巧算?
可以,算法如下:
3.6x2.8-0.4x3.6+2.4x6.4
=3.6x(2.8-0.4)+2.4x6.4
=3.6x2.4+2.4x6.4
=2.4x(3.6+6.4)
=2.4x10
=24
就是反复使用乘法的分配率
楼主是在做考公务员的题呢吧