15×3/8+9×37.5%
=15×3/8+9×3/8
=（15+9）×3/8
=24×3/8
=9
14÷7/2÷12.5%
=14×2/7×0.125
=4×0.125
=0.5
3/5×25%+125%
=0.15+1.25
=1.4
2）
15×3/8+9×37.5%
=15×3/8+9×3/8
=3/8×（15+9）
=9
3)14÷7/2÷12.5%
=14÷（7/2×1/8）
=14÷7/16
=14×16/7
=32
4)3/5×25%+125%
=3/5×1/4+5/4
=3/5×1/4+5×1/4
=1/4×(3/5+5)
=1/4×28/5
=7/5
=9
=32
=1.4
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