7.8*0.25+2.2/4简便计算

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7.8*0.25+2.2/4简便计算7.8*0.25+2.2/4简便计算7.8*0.25+2.2/4简便计算7.8*0.25+2.2/4=7.8×1/4+2.2×1/4=(7.8+2.2)×1/4=1

7.8*0.25+2.2/4简便计算
7.8*0.25+2.2/4简便计算

7.8*0.25+2.2/4简便计算
7.8*0.25+2.2/4
=7.8×1/4+2.2×1/4
=(7.8+2.2)×1/4
=10×0.25
=2.5

7.8*0.25+2.2/4
=7.8×0.25+2.2×0.25
=0.25×(7.8+2.2)
=0.25×10
=2.5

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