问题标题:
【12.48-21.28÷7.6×3.1要脱试】
问题描述:
12.48-21.28÷7.6×3.1要脱试
刘寅虎回答:
=12.48-2.8x3.1
=12.48-8.68
=3.8
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12.48-21.28÷7.6×3.1要脱试