Question

7.9ⅹ0.65-0.65x2.9简便方法？

7.9ⅹ0.65-0.65ⅹ2.9

Answer 1

7.9×0.65－0.65×2.9
=0.65×(7.9－2.9)
=0.65×5
=3.25
这道题运用了乘法分配率

Answer 2

7.9*0.65-0.65*2.9
=0.65*(7.9-2.9)
=0.65*5
=3.25

追答

7.9*0.65-0.65*2.9
=0.65*(7.9-2.9)
=0.65*5
=3.25

Answer 3

(7.9－2.9)×0.65=5×0.65=3.25

Answer 4

7.9ⅹ0.65-0.65ⅹ2.9
＝0.65 ⅹ（7.9-2.9）
＝0.65 ⅹ5
＝3.25

Answer 5

7.9×0.65-0.65×2.9
=0.65×（7.9-2.9）
=0.65×5
=3.25