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数学
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22×3.4-2×34-0.2×20×1.7简便计算
在一个减法算式里,被减数+减数+差=6.24,差是减数的三倍,减数( ).快回答啊,急^^
人气:183 ℃ 时间:2020-04-13 11:56:22
解答
22×3.4-2×34-0.2×20×1.7
=22×3.4-20×3.4-2×3.4
=3.4×(22-20-2)
=3.4×0
=0
被减数=减数+差
被减数:6.24÷2=3.12
减数:3.12÷(3+1)=0.78
这是差倍问题
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