Question

4.2✘2.6+1.3✘1.5+0.13

用简便放法怎么算

Answer 1

4.2×2.6+1.3×1.5+0.13
＝4.2×1.3×2+1.3×1.5+1.3×0.1
＝8.4×1.3+1.3×1.5+1.3×0.1
＝(8.4+1.5+0.1)×1.5
＝10×1.5
＝15

追答

10×1.3＝13

Answer 2

原式
=1.3*(4.2*2+1.5)+0.13
=1.3*10-1.3*0.1+0.13
=13
。。。。
。。。

Answer 3

4.2×2.6+1.3×1.5+0.13
＝4.2×1.3×2+1.3×1.5+1.3×0.1
＝8.4×1.3+1.3×1.5+1.3×0.1
＝(8.4+1.5+0.1)×1.5
＝10×1.5
＝15

Answer 4

4.2×2.6+1.3×1.5+0.13
=4.2×1.3×2+1.3×1.5+1.3×0.1
=1.3×（8.4+1.5+0.1）
=1.3×10
=13

Answer 5

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