Question

18×5/7-5×4/7简便计算？

Answer 1

18×5/7-5×4/7
=18×5/7-4×5/7
=（18-4）×5/7
=14×5/7
=10
这个题运用了乘法分配州手猜，只是要换一下分子，才可以找到公共因数，5×4/7=4×5/7，就可以找到公册型共因数。希望能够帮助你，敬请采纳谢谢薯腊

Answer 2

18(5/7)-5×(4/掘拆袜判激7)
=(90/7)-(20/7)
=(90-20)/御毕7
=70/7
=10.

Answer 3

18×5/拦神悔瞎掘7-5×4/7
=90/7-20/7
=70/7
=10
或
18×5/7-5×4/7
=5/7（18-4）简正
=（5*14）/7
=（5*2*7）/7
=5*2
=10

Answer 4

18X5/链丛友7-5X4/7
=18X5/郑昌7-4X5/7
=5/棚槐7x(18-4)
=5/7x14
=10

Answer 5

18*5/7-5*4/7=18*5/7-4*5/7=(18-4)*5/7=14*5/7=10