2.6+1.4x(1.7-0.3)怎样简便计算
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2.6+1.4×(1.7-0.3)
=2.6+1.4×1.4
=1.3×1.3+(1.3-1)^2
=1.3^2+1.3^2-2×1.3+1
=2×(茄伏塌销1十0.3)^2-2.6+1
=2×(1+0.6+0.09)-1.6
=2十颤衫携1.2+0.18-1.6
=0.4+1.38
=1.78
=2.6+1.4×1.4
=1.3×1.3+(1.3-1)^2
=1.3^2+1.3^2-2×1.3+1
=2×(茄伏塌销1十0.3)^2-2.6+1
=2×(1+0.6+0.09)-1.6
=2十颤衫携1.2+0.18-1.6
=0.4+1.38
=1.78
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展开全部
=2.6+1.4×1.4
=2.6+1.4+1.4×0.4
=4+0.56
=4.56
=2.6+1.4+1.4×0.4
=4+0.56
=4.56
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展开全部
2.6+1.4x(1.7-0.3)
=2.6+1.4*1.4
=2.6+1.4+1.4*0.4
=4+0.56
=4.56
=2.6+1.4*1.4
=2.6+1.4+1.4*0.4
=4+0.56
=4.56
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