*乘 %除7.5+(2.5+3.8)= 10.8-3.9-4.4= (10+0.5)*4= 3.5+3.5+3= 12.5+0.65+0.35= (10-6.8)*0.2= 7*(9.62*0.5)= 0.96%3= 3-0.58= 2-0.37= 1.84+0.16= 0.7*100+52.3= 0.7*1000+0.87= 3%0.015= 10%0.04= 1.5-0.9 9%5*0.25QQ留下
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![*乘 %除7.5+(2.5+3.8)= 10.8-3.9-4.4= (10+0.5)*4= 3.5+3.5+3= 12.5+0.65+0.35= (10-6.8)*0.2= 7*(9.62*0.5)= 0.96%3= 3-0.58= 2-0.37= 1.84+0.16= 0.7*100+52.3= 0.7*1000+0.87= 3%0.015= 10%0.04= 1.5-0.9 9%5*0.25QQ留下](/uploads/image/z/5281172-44-2.jpg?t=%2A%E4%B9%98+%25%E9%99%A47.5%2B%EF%BC%882.5%2B3.8%EF%BC%89%3D+10.8-3.9-4.4%3D+%EF%BC%8810%2B0.5%EF%BC%89%2A4%3D+3.5%2B3.5%2B3%3D+12.5%2B0.65%2B0.35%3D+%EF%BC%8810-6.8%EF%BC%89%2A0.2%3D+7%2A%EF%BC%889.62%2A0.5%EF%BC%89%3D+0.96%253%3D+3-0.58%3D+2-0.37%3D+1.84%2B0.16%3D+0.7%2A100%2B52.3%3D+0.7%2A1000%2B0.87%3D+3%250.015%3D+10%250.04%3D+1.5-0.9+9%255%2A0.25QQ%E7%95%99%E4%B8%8B)
*乘 %除7.5+(2.5+3.8)= 10.8-3.9-4.4= (10+0.5)*4= 3.5+3.5+3= 12.5+0.65+0.35= (10-6.8)*0.2= 7*(9.62*0.5)= 0.96%3= 3-0.58= 2-0.37= 1.84+0.16= 0.7*100+52.3= 0.7*1000+0.87= 3%0.015= 10%0.04= 1.5-0.9 9%5*0.25QQ留下
*乘 %除
7.5+(2.5+3.8)= 10.8-3.9-4.4= (10+0.5)*4= 3.5+3.5+3= 12.5+0.65+0.35= (10-6.8)*0.2= 7*(9.62*0.5)= 0.96%3= 3-0.58= 2-0.37= 1.84+0.16= 0.7*100+52.3= 0.7*1000+0.87= 3%0.015= 10%0.04= 1.5-0.9 9%5*0.25
QQ留下
*乘 %除7.5+(2.5+3.8)= 10.8-3.9-4.4= (10+0.5)*4= 3.5+3.5+3= 12.5+0.65+0.35= (10-6.8)*0.2= 7*(9.62*0.5)= 0.96%3= 3-0.58= 2-0.37= 1.84+0.16= 0.7*100+52.3= 0.7*1000+0.87= 3%0.015= 10%0.04= 1.5-0.9 9%5*0.25QQ留下
先在心里打好草稿 ,如果须要进位,就有手指记好,我就是这样做的,因为口算不会好复杂,虽以不会出错.
7.5+(2.5+3.8) (7.5+2.5)+3.8=13.8
10.8-3.9-4.4 10.8-(3.9+4.4)=2.5
(10+0.5)*4 10*4+0.5*4=42
3.5+3.5+3 (3.5+3.5)+3=10
12.5+0.65+0.35 12.5+(0.65+0.35 )=13.5...
全部展开
7.5+(2.5+3.8) (7.5+2.5)+3.8=13.8
10.8-3.9-4.4 10.8-(3.9+4.4)=2.5
(10+0.5)*4 10*4+0.5*4=42
3.5+3.5+3 (3.5+3.5)+3=10
12.5+0.65+0.35 12.5+(0.65+0.35 )=13.5
以下你自己想;
(10-6.8)*0.2= 0.64 7*(9.62*0.5)=33.67 0.96%3=0.32
3-0.58= 2.42 2-0.37= 1.63 1.84+0.16= 2
0.7*100+52.3= 122.3 0.7*1000+0.87= 700.87 3%0.015= 200
10%0.04= 250
1.5-0.9 9%5*0.25=1.5-0.198*0.25=1.500-0.495=1.005
收起
横排,按顺序的答案如下:
13.8
2.5
42
10
19.35
0.64
33.67
0.32
2.42
1.63
2
122.3
700.87
200
250
0.6
0.45