简便运算 2 .5+2. 7+2 .7×7 .5的 答案是什么? 5
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2.5+2.7+2.7*7.5
=2.7-0.2+2.7+2.7*7.5+1.35-1.35
=2.7+2.7+2.7*7.5+1.35-1.55
=2.7*10-1.55
=27-1.55
=25.45
=2.7-0.2+2.7+2.7*7.5+1.35-1.35
=2.7+2.7+2.7*7.5+1.35-1.55
=2.7*10-1.55
=27-1.55
=25.45
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=2.7×(2.5+7.5)
=2.7×10
=27
=2.7×10
=27
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2.5+2.7+2.7×7.5=2.5+2.7+20.25=5.2+20.25=25.45
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2.5+2.7+2.7x7.5
=2.5+2.7+2.7x7+2.7x0.5
=5.2+18.9+1.35
=5.2+18.8+0.1+1.35
=24+1.45
=25.45
=2.5+2.7+2.7x7+2.7x0.5
=5.2+18.9+1.35
=5.2+18.8+0.1+1.35
=24+1.45
=25.45
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2.5+2.7+2.7×7.5
=5.2+20.25
=25.45
=5.2+20.25
=25.45
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