8.9×3.6-5.02简算
2个回答
(9-0.1)×(4-0.4)-5-0.02
=36-3.6-0.4+0.04-5-0.02
=(36-3-5)-(0.6+0.4)+(0.04-0.02)
=28-1+0.02
=27.02
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