Question

97ⅹ1/8+0.3ⅹ1.25如何简算？

Answer 1

25/2（12.5）
97×1/8+0.3×1.25
=97×1/8+3×0.125
=97×1/8+3×1/8
=（97+3）×1/8
=100×1/8
=25/2
25/2也可化成小数为：25/2=25÷2=12.5
解析：0.3×1.25
=3×0.1×1.25
=3×（0.1×1.25）
=3×0.125
=3×1/8
故原式=97×1/8+3×1/8，再根据乘法分配律，得：
（97+3）×1/8=100x1/8=25/2。

Answer 2

97×1/8+0.3×1.25
=9.7×1.25+0.3×1.25
=1.25×(9.7+0.3)
=1.25×10
=12.5

Answer 3

97x1/8+0.3x1.25
=97x0.125+3x0.125
=(97+3)x0.125
=100x0.125
=12.5。