Question

0.18✘5一0.75x=0.6

递等式能巧算的巧算 (18.5×3.8+3.8×2.5)÷0.19 [32.(7.25+0.75×8) ]÷50 0.02×[7.5-1.75÷(1÷0.5)] 7.8×9.9 7.04÷0.4×2.5 解方程 4(X-6)÷0.5=1.2 8÷(x+1.2)=0.4 0.6(2.1-x)÷0.2=0.3 以上做完有悬赏哦
递等式能巧算的巧算 ①(18.5×3.8+3.8×2.5)÷0.19 ②[32-(7.25+0.75×8) ]÷50 ③0.02×[7.5-1.75÷(1÷0.5)] ④7.8×9.9 ⑤7.04÷0.4×2.5 解方程 ①4(X-6)÷0.5=1.2 ②8÷(x+1.2)=0.4 ③0.6(2.1-x)÷0.2=0.3 以上做完有悬赏哦

Answer 1

1)(18.5×3.8+3.8×2.5)÷0.19=3.8*(18.5+2.5)/0.19=20*20=400
2)[32.(7.25+0.75×8) ]÷50是32乘（）吗?
3)0.02×[7.5-1.75÷(1÷0.5)]=0.02*7.5-0.02*1.75/2=0.15-0.0175=0.1325
4)8*9.9=8*(10-0.1)=8*10-8*0.1=80-0.8=79.2
7.04÷0.4×2.5=126*2.5=315