Question

11.6*4.2+15.8*5.8+4.2*4.2这个算式怎么用简便方法计算？

Answer 1

11.6×4.2+15.8×5.8+4.2×4.2
=4.2×(11.6+4.2)+15.8×5.8
=4.2×15.8+15.8×5.8
=15.8×(4.2+5.8)
=15.8×10
=158

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Answer 2

11.6*4.2+15.8*5.8+4.2*4.2
=11.6*4.2+4.2*4.2+15.8*5.8
=4.2*（11.6+4.2）+15.8*5.8
=4.2*15.8+15.8*5.8
=15.8*（4.2+5.8）
=15.8*10
=158

Answer 3

简单，原式=11.6*4.2+4.2*4.2+15.8*5.8
=4.2*(11.6+4.2)+15.8*5.8
=4.2*15.8+15.8*5.8
=15.8*(4.2+5.8)
=15.8*10
=158

Answer 4

11.6*4.2+15.8*5.8+4.2*4.2 =
2*5.8*4.2+5.8*5.8+4.2*4.2 +10*5.8=（5.8+4.2）*（5.8+4.2） +10*5.8=158好简单

Answer 5

原式=（11.6+4.2）x4.2+15.8x5.8
=15.8x4.2+15.8x5.8
=15.8x(4.2+5.8)
=15.8x10
=158