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8.7×3.5-2.2×3.5+6.5×6.5
=3.5×(8.7-2.2)+6.5×6.5
=3.5×6.5 +6.5×6.5
=6.5×(3.5+6.5)
= 6.5×10
=65
=3.5×(8.7-2.2)+6.5×6.5
=3.5×6.5 +6.5×6.5
=6.5×(3.5+6.5)
= 6.5×10
=65
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展开全部
8.7×3.5-2.2×3.5+6.5×6.5 =3.5x(8.7-2.2+6.5)=3.5x13=
咳咳- -口算不太好。。用计算器吧最后答案
咳咳- -口算不太好。。用计算器吧最后答案
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展开全部
8.7×3.5-2.2×3.5+6.5×6.5
=(8.7-2.2)×3.5+6.5×6.5
=6.5×3.5+6.5×6.5
=6.5×(3.5+6.5)
=6.5×10
=65
=(8.7-2.2)×3.5+6.5×6.5
=6.5×3.5+6.5×6.5
=6.5×(3.5+6.5)
=6.5×10
=65
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