Question

18.5+4.3×2.7简便计算怎么做?

Answer 1

18.5+4.3×2.7
＝18.5+4.3×2+4.3×0.7
＝18.5+8.6+3.01
＝27.1+3.01
＝30.11
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Answer 2

即18.5+4.3×2.7
=18.5+4×2.7+0.3×2.7
=18.5+10.8+0.81
=29.3+0.81
=30.11

Answer 3

简便计算：18.5+4.3×2.7
=18.5+(4+0.3)×(2+0.7) (分配律)
=18.5+(8+2.8+0.6+0.21)
=18.5+11.61
=18+11+0.5+0.61
=29+1.11
=30.11

Answer 4

原式＝18.5+（4+0.3）x（2.5+0.2）
＝18.5+4x2.5+4x0.2+0.3x2.5+0.3x0.2
＝18.5+10+0.8+0.75+0.06
＝28.5+0.8+0.81
＝28.5+1.61
＝28+0.5+1+0.61
＝29+1.11
＝30.11

Answer 5

18.5+4.3×2.7
=18.5+4×2.7+0.3×2.7
=18.5+10.8+0.81
=29.3+0.81
=30.11