Question

用你喜欢的方法计算．2.5×0.32×12.5 ...

用你喜欢的方法计算．2.5×0.32×12.5 0.4×0.2÷0.4×0.2 2.7+1.56+7.3+13.44 3.8×4.5+3.8 301×99 14×[752-（152+28）]．

Answer 1

(8分之7－4分之3)×(9分之8÷3分之1)
=(7/8-6/8)×8/3
=1/8×8/3
=1/3
12分之5÷(21分之19＋7分之3)×5分之1
=5/12÷(19/21+9/21)×1/5
=5/12×1/5×21/28
=1/12×3/4
=1/16
[5分之4÷(3－25分之4)]×15分之4
=(4/5×25/71)×4/15
=20/71×4/15
=80/255
[4分之1×(6分之1÷3分之1)]÷8分之1
=(1/4×1/2)÷1/8
=1
8分之5÷15＋(7分之3＋3分之1)×16分之21
=1/24+3/7×21/16+1/3×21/16
=1/24+9/16+7/16
=1/24+1
=25/24
(12分之1＋4分之1＋3分之1)÷2×0.5
=(1/12+3/12+4/12)÷2×1/2
=8/12×1/4
=1/6