35乘7/34用简便方法怎么算
35乘7/34用简便方法怎么算
35×7/34
=(34+1)×7/34
=34×7/34+1×7/34
=7+7/34
=7又7/34
34除35乘36 简便方法怎么算
34除35乘36
=34/35×(35+1)
=34+34/35
=34又34/35
7/20乘101-7/20用简便方法
7/20乘101-7/20
=7/20*101-7/20
=7/20*(101-1)
=7/20*100
=7*(100/20)
=7*5
=35
18×7/19,简便方法怎么算?
=(19-1)×7/19
=19×7/19-1×7/19
=7-7/19
=6又12/19
88×7/89用简便方法算
88×7/89
=(89-1)×7/89
=89×7/89-7/89
=7-7/89
=6+1-7/89
=6又82/89
7/23×45+7/23用简便方法算。
(1+45)×7/23=14
25又7/161×4,简便方法怎么算?
25又7/161×4
=(25+7/161)×4
=25×4+7/161×4
=100+4/23
=100又4/23
36又7/2*(-8) 简便方法怎么算?
=36×(-8)+7/2×(-8)
=-288-7/2×(7+1)
=-288-2-7/2
=-290又7/2
3.6*7/12 0.48用简便方法计算
3.6*7/12+0.48
=(12x0.3)*7/12+0.48
=0.3x0.7+0.48
=0.21+0.48
=0.69
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