无
*注意事项:
37+58= 810-540= 19×40= 910÷70= 68-0.8=
4÷24= 8.2÷0.1= 12×25%= + = 803-204≈
× = ÷ = 4.48+5.52= 2.02-1.43= 0.08×0.25=
15.9÷3= 1- = - = 0.2 2= 3.2÷0.01=
①
② : = x:
③x- =0.25
④5+0.6x=101
⑤x÷ = 40%
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