Question

简便计算 4.6x9.9十0.46

Answer 1

4.6x9.9十0.46
= 4.6x9.9十4.6*0.1
=4.6*（9.9+0.1）
=4.6*10
=46

Answer 2

4.6x9.9十0.46
=0.46×99+0.46×1
=0.46×（99+1）
=0.46×100
=46；
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