3.68x2.6+5.2x1.32-1.3x4简便计算
2个回答
3.68x2.6+5.2x1.32-1.3x4
=1.84x5.2+5.2x1.32-5.2
=5.2x(1.84+1.32-1)
=5.2x2.16
=11.232
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