脱式计算.
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①(4609-41×39)+43 =(4609-1599)+43 =3010+43 =3053; ②1566÷54×(372-294) =1566÷54×78 =29×78 =2262; ③231×24-775×6 =5544-4650 =894; ④(253+2997÷27)×38 =(253+111)×38 =364×38 =13832; ⑤515÷(607-36×14) =515÷(607-504) =515÷103 =5. |
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