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6.74×99+6.4怎么简算?
3个回答
展开全部
6.74×99+6.4
=6.74×99+6.74-6.74+6.4
=(6.74×99+6.74)+(6.4-6.74)
=6.74×100-0.34
=674-0.34
=673.66
=6.74×99+6.74-6.74+6.4
=(6.74×99+6.74)+(6.4-6.74)
=6.74×100-0.34
=674-0.34
=673.66
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