5.7*2.9+5.7*8.1-5.7简便运算
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5.7*2.9+5.7*8.1-5.7简便运算
![5.7*2.9+5.7*8.1-5.7简便运算](/uploads/image/z/16373551-31-1.jpg?t=5.7%2A2.9%2B5.7%2A8.1-5.7%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
5.7×2.9+5.7×8.1-5.7
=5.7×(2.9+8.1-1)
=5.7×10
=57
=5.7×(2.9+8.1-1)
=5.7×10
=57
74.3-18.65+5.7-1.35简便运算
简便运算:18.1-5.7-4.3+1.9
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