Question

17/25×5/4-0.2×1.25+13/25×5/2×0.5怎么计算？

Answer 1

解：17/25×5/4-0.2×1.25+13/25×5/2×0.5等于（ 5/4 ），【即等于1.25】
∵已知需求出17/25×5/4-0.2×1.25+13/25×5/2×0.5等于多少

∴17/25 × 5/4 - 0.2 × 1.25 + 13/25 × 5/2 × 0.5
= 17/20 - 2/10 × （1×100+25）/100 + 13/10 × 5/10
= 17/20 - 1/5 × 125/100 + 13/10 × 1/2
= 17/20 - 1/5 × 5/4 + 13/20
= 17/20 - 1/4 + 13/20
= 17/20 - 5/20 + 13/20
= 12/20 + 13/20
= 25/20
= 5/4
= 1.25
答：17/25×5/4-0.2×1.25+13/25×5/2×0.5等于5/4，【即等于1.25】