Question

1.6乘7.5乘1.25的简便方法

Answer 1

（1.6x7.5）x1.25

(0.2×8)×7.5×1.25=(0.2×7.5)×(8×1.25)=1.5×10=15

1.6×7.5×1.25 =0.2×8×7.5×1.25 =0.2×7.5×(8×1.25) =1.5×10 =15

Answer 2

1.6×7.5×1.25
＝0.8×1.25×(2×7.5)
＝1×15
＝15

Answer 3

 

追答

求采纳

Answer 4

 

Answer 5