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10.1x5.2%0.52怎么简便运算

原式=101×0.52-0.52×1 =0.52×(101-1) =0.52×100 =52

(5十0.2)X(10十0.1)=50十0.5十2十0.02二52.52

5.2×10.1 =5.2×10+5.2×0.1 =52+0.52 =52.52

=2/5x(1/10+9/10)=2/5x1=2/5

代码如下: #includevoid main(){float a,b;a=1/10.0;b=1/0.5; printf("1/10=%0.2f;1/0.5=%0.2f\n",a,b);}

1/2+2/5-3/10+0.6 =(1/2-3/10)+(2/5+0.6) =1/5+1 =6/5

3(x+2.1)=10.5 去括号得:3x+3×2.1=10.5 移项得:3x=10.5-3×2.1 合并同类项得:3x=4.2 系数化为一得:x=1.4

16

=(11/9-2/9)+(1/10+2/5) =1+3/10 =1又3/10

4÷4/5−4/5÷4 =4*5/4-4/5*1/4 =5-1/5 =24/5 7/11÷[2/5−(1−7/10)] =7/11÷(2/5-3/10) =7/11÷1/10 =7/11*10 =70/11

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