39×760= 574÷70= 306×25= 473÷60=
864÷48=
950÷19=
★608÷79=
①342×15=
②506×24=
③450×32=
④850÷70=
⑤775÷38= 验算:
方法一:
方法二:
①(+-)÷
②12-(1+2)
③5÷[(+)×]
④2.5×3.2×0.125
⑤0.125×+×8.25+12.5%
⑥÷﹣