(5分之3加25分之4除5分之2)乘3分之1(需要过程 )

2025-03-17 12:38:04
推荐回答(1个)
回答1:

①﹙3/5+4/25÷2/5﹚×1/3 =﹙3/5+2/5﹚×1/3 =1×1/3 =1/3 ②2700×7/9÷5=2100÷5=420(个) ③54÷6/5-20=45-20=25(km/h) ④13/4×4-4÷4/3=13/4×0÷3/4=0 更正:13/4×4-4÷4/3=13-3=10(先乘除,后加减) ⑤5/6÷3/4+1/6÷3/4=5/6×3/4+1/6×3/4=﹙5/6+1/6﹚×3/4=3/4 更正:5/6÷3/4+1/6÷3/4=5/6×4/3+1/6×4/3=﹙5/6+1/6﹚×4/3=4/3(倒乘代除)