计算下面各题
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| (1)350÷7+24×3 =50+72 =122; (2)618-80÷2×5 =618-40×5 =618-200 =418; (3)243+65+(57+135) =(243+57)+(65+135) =300+200 =500; (4)15×(41-17)÷30 =15×24÷30 =360÷30 =12; (5)45×13+13×55 =13×(45+55) =13×100 =1300; (6)25×(9×4)×3 =(25×4)×(9×3) =100×27 =2700; (7)45÷[210÷(35×2)] =45÷[210÷70] =45÷3 =15. |
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