两道计算题 (1/2+1/3)×3/4÷1/4 225-25×3.2

问题描述:

两道计算题 (1/2+1/3)×3/4÷1/4 225-25×3.2

(1/2+1/3)×3/4÷1/4
=5/6×3/4×4
=5/2
225-25×3.2
=25×(9-3.2)
=25×5.8
=145