直接写出得数 678-297= 2/3+1/4= 1.25*0.7*8= 6.4*3/8= 11/20/0.11= 5除以7+七分之二= 0.2/0.2/0.2= 0.5/2题目是这样的直接写出得数678-297= 2/3+1/4= 1.25*0.7*8= 6.4*3/8= 11/20/0.11= 5除以7+七分之二= 0.2/0.2/0.2= 0.5/2/7=用简
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![直接写出得数 678-297= 2/3+1/4= 1.25*0.7*8= 6.4*3/8= 11/20/0.11= 5除以7+七分之二= 0.2/0.2/0.2= 0.5/2题目是这样的直接写出得数678-297= 2/3+1/4= 1.25*0.7*8= 6.4*3/8= 11/20/0.11= 5除以7+七分之二= 0.2/0.2/0.2= 0.5/2/7=用简](/uploads/image/z/2585071-55-1.jpg?t=%E7%9B%B4%E6%8E%A5%E5%86%99%E5%87%BA%E5%BE%97%E6%95%B0+678-297%3D+2%2F3%2B1%2F4%3D+1.25%2A0.7%2A8%3D+6.4%2A3%2F8%3D+11%2F20%2F0.11%3D+5%E9%99%A4%E4%BB%A57%2B%E4%B8%83%E5%88%86%E4%B9%8B%E4%BA%8C%3D+0.2%2F0.2%2F0.2%3D+0.5%2F2%E9%A2%98%E7%9B%AE%E6%98%AF%E8%BF%99%E6%A0%B7%E7%9A%84%E7%9B%B4%E6%8E%A5%E5%86%99%E5%87%BA%E5%BE%97%E6%95%B0678-297%3D+2%2F3%2B1%2F4%3D+1.25%2A0.7%2A8%3D+6.4%2A3%2F8%3D+11%2F20%2F0.11%3D+5%E9%99%A4%E4%BB%A57%2B%E4%B8%83%E5%88%86%E4%B9%8B%E4%BA%8C%3D+0.2%2F0.2%2F0.2%3D+0.5%2F2%2F7%3D%E7%94%A8%E7%AE%80)
直接写出得数 678-297= 2/3+1/4= 1.25*0.7*8= 6.4*3/8= 11/20/0.11= 5除以7+七分之二= 0.2/0.2/0.2= 0.5/2题目是这样的直接写出得数678-297= 2/3+1/4= 1.25*0.7*8= 6.4*3/8= 11/20/0.11= 5除以7+七分之二= 0.2/0.2/0.2= 0.5/2/7=用简
直接写出得数 678-297= 2/3+1/4= 1.25*0.7*8= 6.4*3/8= 11/20/0.11= 5除以7+七分之二= 0.2/0.2/0.2= 0.5/2
题目是这样的
直接写出得数
678-297= 2/3+1/4= 1.25*0.7*8= 6.4*3/8= 11/20/0.11=
5除以7+七分之二= 0.2/0.2/0.2= 0.5/2/7=
用简便方法计算(写出简便过程)
6.47-(4/9+5.47)-5/9 8.2*9.2+8*0.82
直接写出得数 678-297= 2/3+1/4= 1.25*0.7*8= 6.4*3/8= 11/20/0.11= 5除以7+七分之二= 0.2/0.2/0.2= 0.5/2题目是这样的直接写出得数678-297= 2/3+1/4= 1.25*0.7*8= 6.4*3/8= 11/20/0.11= 5除以7+七分之二= 0.2/0.2/0.2= 0.5/2/7=用简
678-297=481
2/3+1/4=11/12
1.25*0.7*8=7
6.4*3/8=2.4
11/20/0.11= 5
5除以7+七分之二=1
0.2/0.2/0.2=5
0.5/2/7=1/28
6.47-(4/9+5.47)-5/9
=6.47-5.47-4/9-4/9
=1-1
=0
8.2*9.2+8*0.82
=8.2*.92+0.8*8.2
=8.2*(9.2+0.8)
=8.2*10
=82
678-297= 381
2/3+1/4= 11/12
1.25*0.7*8= 7
6.4*3/8= 2.4
11/20/0.11= 5
5除以7+七分之二=1
0.2/0.2/0.2= 0.2
0.5/2=0.25
6.47-(4/9+5.47)-5/9
= 6.47-4/9 -5.47 -5/9
...
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678-297= 381
2/3+1/4= 11/12
1.25*0.7*8= 7
6.4*3/8= 2.4
11/20/0.11= 5
5除以7+七分之二=1
0.2/0.2/0.2= 0.2
0.5/2=0.25
6.47-(4/9+5.47)-5/9
= 6.47-4/9 -5.47 -5/9
=6.47-5.47 -(4/9 +5/9)
=1-1
=0
8.2*9.2+8*0.82
=0.82*10*9.2 +8*0.82
=0.82*92 +0.82*8
=(92+8)*0.82
=100*0.82
=82
收起
678-297=381 2/3+1/4=11/12 1.25*0.7*8=7 6.4*3/8=2.4 11/20/0.11= 5
5除以7+七分之二= 1 0.2/0.2/0.2=5 0.5/2/7=1/28
6.47-(4/9+5.47)-5/9=6.47-5.47-4/9-5/9=(6.47-5.47)-(4/9+5/9)=1+1=2
8.2*9.2+8*0.82=8.2*9.2+0.8*8.2=8.2*(9.2+0.8)=8.2*10=82
687-297=287-300+3=381 2/3+1/4=8/12+3/12=11/12 1.25*0.7*8=(8+2)*0.7=7
6.4*3/8=6.4/8*3=0.8*3=2.4 11/20/0.11==11/0.11/20=100/20=5
5/(7+2/7)=5/(51/7)=35/51 0.2/0.2/0.2=1/0.2=5 0.5/2/7=0.5/14=1/28
6.47-(4/9+5.47)=6.47-5.47-4/9=1-4/9=5/9
8.2*9.2+8*0.82=8.2*9.2+0.8*8.2=8.2*(9.2+0.8)=8.2*10=82