(7/10+1/2)÷3/8-1/5,8/45×5/8+3/7÷9/28,3/10÷(2/5+4/15)-1/5,简便计算,
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/14 06:20:55
![(7/10+1/2)÷3/8-1/5,8/45×5/8+3/7÷9/28,3/10÷(2/5+4/15)-1/5,简便计算,](/uploads/image/z/96853-13-3.jpg?t=%287%2F10%2B1%2F2%29%C3%B73%2F8-1%2F5%2C8%2F45%C3%975%2F8%2B3%2F7%C3%B79%2F28%2C3%2F10%C3%B7%EF%BC%882%2F5%EF%BC%8B4%2F15%EF%BC%89%EF%BC%8D1%2F5%2C%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%2C)
xRJ@.[x瑱 UI\B$\5"IU~;
S-t33s_àJ,
WdCA\Q$š_d0isYGD]x|tL4cu~ePnRi@M`ĦdOglqWo;z{vT4,Y4U|z[⦎2#߿9h_R+v35W綊gojkpv1XGBb(B !(>G4
(7/10+1/2)÷3/8-1/5,8/45×5/8+3/7÷9/28,3/10÷(2/5+4/15)-1/5,简便计算,
(7/10+1/2)÷3/8-1/5,8/45×5/8+3/7÷9/28,3/10÷(2/5+4/15)-1/5,简便计算,
(7/10+1/2)÷3/8-1/5,8/45×5/8+3/7÷9/28,3/10÷(2/5+4/15)-1/5,简便计算,
(7/10+1/2)÷3/8-1/5
=(7/10+1/2)×8/3-1/5
=7/10×8/3+1/2×8/3-1/5
=28/15+4/3-1/5
=28/15+20/15-3/15
=45/15
=3
8/45×5/8+3/7÷9/28
=8/45×5/8+3/7×28/9
=1/9+4/3 分数乘法可以约简
=1/9+12/9
=13/9
3/10÷(2/5+4/15)-1/5
=3/10÷(6/15+4/15)-1/5 括号前是除法的,只能先算括号内的.
=3/10÷10/15-1/5
=3/10×15/10-1/5
=45/100-20/100
=25/100
=1/4