9.9×6.5+6.6×3.5-6.5×3.3
=9.9×6.5+6.5×3.5-6.5×3.3+3.5×0.1
=6.5×（9.9+3.5-3.3）+0.35
=6.5×（10+0.1）+0.35
=65+0.65+0.35
=66
=9.9×6.5+6.5×3.5-6.5×3.3+3.5×0.1
=6.5×（9.9+3.5-3.3）+0.35
=6.5×（10+0.1）+0.35
=65+0.65+0.35
=66
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第1个回答 2016-12-06
9.9×6.5+6.6×3.5-6.5×3.3
=(3.3 + 6.6) x 6.5 + 6.6 x 3.5 - 6.5 x 3.3
= 6.5 x 3.3 + 6.5 x 6.6 + 6.6 x 3.5 - 6.5 x 3.3
= 6.5 x 6.6 + 6.6 x 3.5
= (6.5 + 3.5 )x 6.6
=10 x6.6
=66
=(3.3 + 6.6) x 6.5 + 6.6 x 3.5 - 6.5 x 3.3
= 6.5 x 3.3 + 6.5 x 6.6 + 6.6 x 3.5 - 6.5 x 3.3
= 6.5 x 6.6 + 6.6 x 3.5
= (6.5 + 3.5 )x 6.6
=10 x6.6
=66
第2个回答 2016-12-05
=(9.9-3.3)*6.5+6.5*3.5+0.1*3.5
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