3.625乘以18加32.75乘以1.8简便方法?
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3.625×18+32.75×1.8
=36.25×1.8+32.75×1.8
=1.8×(36.25+32.75)
=1.8×69
=1.8×(70-1)
=1.8×70-1.8×1
=126-1.8
=124.2
=36.25×1.8+32.75×1.8
=1.8×(36.25+32.75)
=1.8×69
=1.8×(70-1)
=1.8×70-1.8×1
=126-1.8
=124.2
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展开全部
3.625×18+32.75×1.8
=3.625×18+3,275×18
=(3.625+3.275)×18
=6.9×18
=6.9×(20-2)
=138-13.8
=124.2
=3.625×18+3,275×18
=(3.625+3.275)×18
=6.9×18
=6.9×(20-2)
=138-13.8
=124.2
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