68.8+1.2×6.5用简便方法怎么算?
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68.8+1.2×6.5用简便方法这么算:
68.8+1.2×6.5
=68.8+1.2+1.2×5.5
=70+6.6
=76.6
68.8+1.2×6.5
=68.8+1.2+1.2×5.5
=70+6.6
=76.6
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66.8+1.2x6.5
=66.8+(1+0.2)x6.5
=66.8+6.5+6.5x0.2
=73.3+1.3
=74.6
=66.8+(1+0.2)x6.5
=66.8+6.5+6.5x0.2
=73.3+1.3
=74.6
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2021-06-21
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68.8+1.2×6.5=68.8+1.2+1.2×5.5
=70+1.2×5.5
=70+5.5+0.2×5.5
=75.5+1.1
=76.6
=70+1.2×5.5
=70+5.5+0.2×5.5
=75.5+1.1
=76.6
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