脱式计算(3/4+1/6)*2/3 25*1/5-5*1/5 6/11*7/15*10 (1/7+1/4)*28 (21+2/5)*5/7 39*7/13*2/3
计算60*2/5=4*2/9=脱式计算3/10*2/3+1/420*2/5-5/82/9*8+2/95/7*1/5*4948*1/12*5/6接着帮我做一下这些题,没空啦...
计算60*2/5= 4*2/9= 脱式计算3/10*2/3+1/4 20*2/5-5/8 2/9*8+2/9 5/7*1/5*49 48*1/12*5/6 接着帮我做一下这些题,没空啦所以。。。。。
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2016-09-18
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(3/4+1/6)*2/3 =(9/12+2/12)x2/3=11/18
25*1/5-5*1/5 =5-1=4
6/11*7/15*10 =60/15x7/11=28/11
(1/7+1/4)*28 =4+7=11
(21+2/5)*5/7 =15+2/7
39*7/13*2/3=14
60*2/5=12x2=24
4*2/9=8/9
3/10*2/3+1/4=1/5+1/4=9/20
20*2/5-5/8 =8-5/8=6+3/8
2/9*8+2/9=2 /9x(8+1)=2
5/7*1/5*49 =1/7
48*1/12*5/6 =20/6=10/3
25*1/5-5*1/5 =5-1=4
6/11*7/15*10 =60/15x7/11=28/11
(1/7+1/4)*28 =4+7=11
(21+2/5)*5/7 =15+2/7
39*7/13*2/3=14
60*2/5=12x2=24
4*2/9=8/9
3/10*2/3+1/4=1/5+1/4=9/20
20*2/5-5/8 =8-5/8=6+3/8
2/9*8+2/9=2 /9x(8+1)=2
5/7*1/5*49 =1/7
48*1/12*5/6 =20/6=10/3
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