1.3+1/4-1/2+1/4-0.2÷4计算方法?
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1.3+1/4-1/2+1/4-0.2÷4
=1.3+1/4-1/2+1/4-1/20
=1又3/10−1/2+1/2-1/20
=1又3/10-1/20
=1又1/4
=1.3+1/4-1/2+1/4-1/20
=1又3/10−1/2+1/2-1/20
=1又3/10-1/20
=1又1/4
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1.3+1/4-1/2+1/4-0.2÷4
=1.3+0.25-0.5+0.25-0.05
=1.3-0.05
=1.25
=1.3+0.25-0.5+0.25-0.05
=1.3-0.05
=1.25
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1.3+1/4-1/2+1/4-0.2÷4
=1.3+(1/4+1/4-1/2)-0.05
=1.3+0-0.05
=1.25
=1.3+(1/4+1/4-1/2)-0.05
=1.3+0-0.05
=1.25
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1.3+1/4-1/2+1/4-0.2÷4
=1.3+(1/4+1/4)-0.5-0.05
=1.3+0.5-0.5-0.05
=1.3-0.05
=1.25
=1.3+(1/4+1/4)-0.5-0.05
=1.3+0.5-0.5-0.05
=1.3-0.05
=1.25
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