8.9*1.1+15.7*8.9+6.8*1.1怎么用简便算法解答
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8.9*1.1+15.7*8.9+6.8*1.1怎么用简便算法解答
![8.9*1.1+15.7*8.9+6.8*1.1怎么用简便算法解答](/uploads/image/z/16249580-44-0.jpg?t=8.9%2A1.1%2B15.7%2A8.9%2B6.8%2A1.1%E6%80%8E%E4%B9%88%E7%94%A8%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95%E8%A7%A3%E7%AD%94)
8.9×1.1+15.7×8.9+6.8×1.1
解原式= (8.9+6.8)×1.1+15.7×8.9
= 15.7×1.1+15.7×8.9
= 15.7×(1.1+8.9)
= 15.7×10
=157
解原式= (8.9+6.8)×1.1+15.7×8.9
= 15.7×1.1+15.7×8.9
= 15.7×(1.1+8.9)
= 15.7×10
=157