急.谁能给我出20道分数乘法简算!比如(5/3+7/3)×9 就是这种利用乘法分配律简算的! =5/3×9+7/3×9 =15+21 =31
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![急.谁能给我出20道分数乘法简算!比如(5/3+7/3)×9 就是这种利用乘法分配律简算的! =5/3×9+7/3×9 =15+21 =31](/uploads/image/z/199575-63-5.jpg?t=%E6%80%A5.%E8%B0%81%E8%83%BD%E7%BB%99%E6%88%91%E5%87%BA20%E9%81%93%E5%88%86%E6%95%B0%E4%B9%98%E6%B3%95%E7%AE%80%E7%AE%97%21%E6%AF%94%E5%A6%82%EF%BC%885%2F3%2B7%2F3%29%C3%979++++%E5%B0%B1%E6%98%AF%E8%BF%99%E7%A7%8D%E5%88%A9%E7%94%A8%E4%B9%98%E6%B3%95%E5%88%86%E9%85%8D%E5%BE%8B%E7%AE%80%E7%AE%97%E7%9A%84%21++++%3D5%2F3%C3%979%2B7%2F3%C3%979++++%3D15%2B21++++%3D31)
急.谁能给我出20道分数乘法简算!比如(5/3+7/3)×9 就是这种利用乘法分配律简算的! =5/3×9+7/3×9 =15+21 =31
急.谁能给我出20道分数乘法简算!
比如(5/3+7/3)×9 就是这种利用乘法分配律简算的!
=5/3×9+7/3×9
=15+21
=31
急.谁能给我出20道分数乘法简算!比如(5/3+7/3)×9 就是这种利用乘法分配律简算的! =5/3×9+7/3×9 =15+21 =31
(1/2+2/3)*6=1/2*6+2/3*6=3+4=7
(2/3+3/4)*12=2/3*12+3/4*12=8+9=17
(1/3+1/4)*12=1/3*12+1/4*12=4+3=7
(1/4+1/5)*20=1/4*20+1/5*20=5+4=9
(2/3+2/5)*15=2/3*15+2/5*15=10+6=16
(3/4+1/2)*4=3/4*4+1/2*4=3+2=5
(10/11+12/10)*110=10/11*110+12/10*110=100+132=232
(2/5+2/7)*35=2/5*35+2/7*35=14+10=24
(3/5+3/7)*35=3/5*35+3/7*35=21+15=36
(4/5+5/6)*30=4/5*30+5/6*30=24+25=49
(5/7+5/8)*56=5/7*56*5/8*56=40+35=75
(8/9+9/10)*90=8/9+90*9/10*90=80+81=161
(11/12+6/5)*60=11/12*60+6/5*60=55+72=127
(9/5+9/4)*20=9/5*20+9/4*20=36+45=81
(4/7+5/6)*42=4/7*42+5/6*42=24+35=59
(3/8+2/9)*72=3/8*72+2/9*72=24+16=40
(1/11+1/15)*165=1/11*165+1/15*165=15+11=26
(1/20+1/30)*60=1/20*60+1/30*60=3+2=5
(2/31+3/62)*62=2/31*62+3/62*62=4+3=7
(11/16+13/32)*32=11/16*32+13/32*32=22+13=35