Question

2.7×7.6×2.4-0.2×7.6简便方法？

Answer 1

2.7×7.6×2.4-0.2×7.6
=7.6×（2.7×2.4-0.2）
=7.6×（3×3×0.3×0.3×8-0.2）
=7.6×6.28
=7.6×（5+1+0.3-0.02）
=38+7.6+2.28-0.152
=47.88-0.152
=47.728

Answer 2

2.7×7.6一7.6X2.4一0.2×7.6
=7.6×（2.7-2.4-0.2）
=7.6×0.1=0.76

Answer 3

7.6*（2.7+2.4-0.2）
=7.6*4.9
=7.6*5-7.6*0.1
=38-0.76
=37.24

Answer 4

原式=7.6x（2.7x2.4-0.2）
=7.6x[2.7x（2+0.4）-0.2]
=7.6x（2.7x2+2.7x0.4-0.2）
=7.6x（5.4+0.54x2-0.2）
=7.6x（5.4+1.08-0.2）
=7.6x（5.2+1.08）
=7.6x6.28
=6.28x（7+0.6）
=6.28x7+6.28x0.6
=7x（6+0.2+0.08）+6.28x0.6
=7x6+7x0.2+7x0.08+6.28x0.6
=42+1.4+0.56+6.28x0.6
=42+1.96+6.28x0.6
=43.96+0.6x（6+0.2+0.08）
=43.96+3.6+0.12+0.048
=43.96+3.72+0.048
=43.96+3.768
=44-0.04+3.768
=44+3.728
=47.728