甲乙两数的比是3:5,甲数是15,乙数是25. .
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= .
计算:(1)625×32= ;(2)1+2+3+4+5+6+…+49+50+49+…+13+12+11= .