120÷(89一74)X40 25一4.3+13.2 (16+32)X(48一23)

120÷(89一74)X40
25一4.3+13.2
(16+32)X(48一23) 计算

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120÷(89一74)X40
=120*40÷15
=120÷3*40÷5
=40*8
=320

25一4.3+13.2
=20.7+13.2
=33.9

(16+32)X(48一23)
=48*25
=12*4*25
=12*100
=1200

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1. =120÷15*40=8*40=320

2. =38.2-4.3=33.9

3. =（答盯16+32）清枣和岩缺*25=4*4*25+4*8*25=400+800=1200
   

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①=120÷15×40=8×40=320

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用计算器算不得了（按计算顺序算）

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