
6.5x7.8+3.5x2.2十3x2.2简便计算
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展开全部
6.5x7.8+3.5x2.2+3x2.2
=6.5x7.8+(3.5+3)x2.2
=6.5x(7.8+2.2)
=65
=6.5x7.8+(3.5+3)x2.2
=6.5x(7.8+2.2)
=65
展开全部
=6.5×7.8+(3.5+3)×2.2
=6.5×7.8+6.5×2.2
=6.5×(7.8+2.2)
=6.5×10
=65
=6.5×7.8+6.5×2.2
=6.5×(7.8+2.2)
=6.5×10
=65
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展开全部
6.5x7.8+3.5x2.2十3x2.2
=6.5x7.8+(3.5+3)x2.2
=6.5x7.8+6.5x2.2
=6.5x(7.8+2.2)
=6.5x10
=65
=6.5x7.8+(3.5+3)x2.2
=6.5x7.8+6.5x2.2
=6.5x(7.8+2.2)
=6.5x10
=65
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展开全部
=6.5*7.8+(3.5+3)*2.2
=6.5*7.8+6.5*2.2
=6.5*(7.8+2.2)
=65
望采纳!!谢谢!
=6.5*7.8+6.5*2.2
=6.5*(7.8+2.2)
=65
望采纳!!谢谢!
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