
用简便方法计算19/13-7/40-6/13
用简便方法计算19/13-7/40-6/13
19/13-7/40-6/13
= (19/13-6/13)-7/40
=1-7/40
=40/40-7/40
=33/40
19/17*13-13/17*2=()(用简便方法计算)
19/17*13-13/17*2
=13/17x19-13/17x2
=13/17x(19-2)
=13/17x17
=13
(8-6/13-7/13)×2/7,简便计算,快!
(8-6/13-7/13)×2/7
=[8-(6/13-7/13)]×2/7
=[8-1]×2/7
=7×2/7
=2
13/25×19加19/25×7简便计算
13/25×19+19/25×7
=19/25×13+19/25×7
=19/25x(13+7)
=19/25x20
=19/5x4
=76/5
6/7×13×35/6用简便方法计算。
原式=6/7×35/6×13
=5×13
=65
—(2/13+8/15)+(2/13-7/15)简便计算
—(2/13+8/15)+(2/13-7/15)
=-2/13+2/13-(8/15+7/15)
=0-1
=-1
1-6/7+(10/13+6/7)用简便方法计算
=1-6/7+10/13+6/7
=1+10/13
=13/13+10/13
=23/13
19×13/34+13×15/34用简便方法计算
19×13/34+13×15/34
=19×13/34+15×13/34
=(19+15)×13/34
=34×13/34
=13
简便方法计算(-13/17)*19-(13/17)*15
(-13/17)*19-(13/17)*15
=(-13/17)*(19-15)
=(-13/17)*4
=-52/17

2023-08-01 广告