Question

计算(能简算的简算

Answer 1

如图所示

Answer 2

(3)1/2÷(1.25×5/7十1又1/4x2/7)
=1/2÷[5/4X(5/7十2/7)]
=1/2÷[5/4x1]
=1/2x4/5
=2/5
(5)6又13/14÷1/7
=93/14×7
=93/2
=46又1/2
(6)(3又1/5十2又2/3)÷1/15
=(16/5十8/3)÷1/15
=(48/15+40/15)÷1/15
=88/15x15
=88
(7)(17又1/2一3又3/4)÷1/2÷1/4
=(35/2一15/4)÷1/2÷1/4
=(70/4一15/4)÷1/2÷1/4
=55/4x4x2
=110
(8)(1/4十1/6十1/8十1/12)x24
=1/4×24+1/6x24十1/8×24十1/12Ⅹ24
=6十4十3十2
=15
(9)4/33×33/4÷4/33x33/4
=1÷4/33×33/4
=1x33/4×33/4
=1089/16