13.7×3.5-3.7×3.7能简算吗? 请求帮助,急用!!!
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13.7x3.5-3.7x3.7
=13.7x3.5-3.7x3.5-3.7x0.2
=3.5x(13.7-3.7)-0.74
=3.5x10-0.74
=35-1+0.26
=34.26
=13.7x3.5-3.7x3.5-3.7x0.2
=3.5x(13.7-3.7)-0.74
=3.5x10-0.74
=35-1+0.26
=34.26
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展开全部
13.7×3.5-3.7×3.7
=(10+3.7)x3.5-3.7x3.7
=10x3.5+3.7x3.5-3.7x3.7
=35+3.7x(3.5-3.7)
=35+3.7x(-0.2)
=35-7.4
=27.6
=(10+3.7)x3.5-3.7x3.7
=10x3.5+3.7x3.5-3.7x3.7
=35+3.7x(3.5-3.7)
=35+3.7x(-0.2)
=35-7.4
=27.6
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