题目内容
下面的题计算正确的是
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A.7+8=17 B.19-9=9
C.3+8=11 D.14-9=4
下面各题计算正确的是
A.473+27-473+27
=500-500
=0
B.780-780÷6+294
=0÷6+294
=0+294
=294
C.74+100÷5×3
=74+20×3
=74+60
=134