7.85L= mL; 1dm3= cm3;3600mL= cm3= dm3;3.08m3= dm3= cm3.
23×(99+1)=23×99+23,应用的运算定律是 .
3.14×0.68+31.4×0.032.
计算:16×25×32×125= .
计算:667+458+345+542+333= .
计算:25×34×32×125= .