运用所学的乘法公式计算
19又3分2乘以20又3分之1加上9分之1
人气：156 ℃ 时间：2020-03-20 05:24:38
解答
(19+2/3)*(20+1/3)+1/9
=380+19/3+40/3+2/9+1/9
=380+59/3+1/3
=380+20
=400
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