56.6-4.3+43.4-5.7的简便计算
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56.6-4.3+43.4-5.7的简便计算
56.6-4.3+43.4-5.7的简便计算
56.6-4.3+43.4-5.7的简便计算
=(56.6+43.4)-(4.3+5.7)
=100-10
=90
(56.6+43.4)-(4.3+5.7)
56.6-4.3+43.4-5.7的简便计算
56.6-4.3+43.4-5.7的简便计算
56.6-4.3+43.4-5.7的简便计算
=(56.6+43.4)-(4.3+5.7)
=100-10
=90
(56.6+43.4)-(4.3+5.7)