两道计算题 (1/2+1/3)×3/4÷1/4 225-25×3.2

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两道计算题 (1/2+1/3)×3/4÷1/4 225-25×3.2
两道计算题 (1/2+1/3)×3/4÷1/4 225-25×3.2

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

(1/2+1/3)×3/4÷1/4
=1/6×3/4×4
=1/2


225-25×3.2
=25×(9-3.2)
=25×5.8
=145

第一个5/2第二个145

(1/2+1/3)×3/4÷1/4==5/6×3/4÷1/4=5/8÷1/4=5/2=2.5
225-25×3.2=225-80=145

(1/2+1/3)×3/4÷1/4=(1/2+1/3)×(3/4÷1/4)
=1/2*3+1/3*3
=3/2+1
=5/2

225-25×3.2
=225-25*16/5
=225-80
=145
手提电脑,打字不方便,你看懂就行,就是把式子分解后再相加