6.7*3.6+3.6*3.3 和9.8*25的简便计算
1个回答
6.7*3.6+3.6*3.3
=(6.7+3.3)×3.6
=10×3.6
=36
9.8*25
=4.9×(2×25)
=4.9×50
=245
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