①ê703-427=验算:
②ê827+185=验算
③490×5=
④278×7=
⑤603×4=
⑥325×8=
①526×3=
②325×8=
③※504-275=
④480×4=
⑤806×7=
⑥※462+339=
①273﹣73﹣27
②1.25×9.78×80
③()×24
④[1﹣()]÷
①(+-)÷
②12-(1+2)
③5÷[(+)×]
④2.5×3.2×0.125
⑤0.125×+×8.25+12.5%
⑥÷﹣