巧算:5.6×7.2×20.4÷2.8÷3.6÷5.1

来源:学生作业帮助网 编辑:作业帮 时间:2024/07/28 09:40:59
巧算:5.6×7.2×20.4÷2.8÷3.6÷5.1
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巧算:5.6×7.2×20.4÷2.8÷3.6÷5.1
巧算:5.6×7.2×20.4÷2.8÷3.6÷5.1

巧算:5.6×7.2×20.4÷2.8÷3.6÷5.1
5.6×7.2×20.4÷2.8÷3.6÷5.1
=(5.6÷2.8)×(7.2÷3.6)×(20.4÷5.1)
=2×2×4
=16

5.6×7.2×20.4÷2.8÷3.6÷5.1=(5.6÷2.8)×(7.2÷3.6)×(20.4÷5.1)=2×2×4=16

原式=1.4×4×3.6×2×5.1×4÷1.4÷2÷3.6÷5.1=4×4=16