脱式计算,能简算的要简算1.3.8+3.91÷(22-19.7)2.68÷[0.5x(7.5-0.7)]3.352-16
1个回答
1. 3.8+3.91÷(22-19.7)
=3.8+3.91÷2.3
=3.8+1.7
=5.5
68÷[0.5x(7.5-0.7)]
=68÷[0.5x6.8]
=68÷0.5÷6.8
=68÷6.8÷0.5
=20
352-162÷36x24
=352-4.5x24
=352-108
=244
[六分之五-(十四分之五-七分之二)]x十八分之七
[5/6-(5/14-2/7)]x7/18
=(5/6-1/14)x7/18
=16/21x7/18
=8/27
(三分之一+六分之一+九分之一)÷三十六分之一
=(1/3+1/6+1/9)÷1/36
=(6/18+3/18+2/18)x36
=11/18x36
=22
八分之一x[二分之一÷(五分之三x九分之十)]
=1/8x[1/2÷(3/5x10/9)]
=1/8x[1/2÷2/3]
=1/8x1/2x3/2
=3/32
相关问题
