56.4✘6.5-0.65✘344的简便方法?
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56.4*6.5-0.65*344
=56.4*6.5-6.5*34.4
=6.5*(56.4-34.4)
=6.5*22
=143
=56.4*6.5-6.5*34.4
=6.5*(56.4-34.4)
=6.5*22
=143
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原式=56.4×6.5-6.5×34.4
=6.5×(56.4-34.4)
=6.5×22
=143
=6.5×(56.4-34.4)
=6.5×22
=143
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解析:依题意可得,
56.4×6.5-0.65×344
=56.4×6.5-6.5×34.4
=6.5×(56.4-34.4)
=6.5×22
=6.5×20+6.5×2
=130+13
=143
56.4×6.5-0.65×344
=56.4×6.5-6.5×34.4
=6.5×(56.4-34.4)
=6.5×22
=6.5×20+6.5×2
=130+13
=143
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这个就是有简便,也比较难算
56.4×6.5-0.65×344
=564×0.65-0.65×344
=0.65×(564-344)
=0.65×220
=0.65×(200+20)
=0.65×200+0.65×20
=130+13
=143
56.4×6.5-0.65×344
=564×0.65-0.65×344
=0.65×(564-344)
=0.65×220
=0.65×(200+20)
=0.65×200+0.65×20
=130+13
=143
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56.4×6.5-0.65×344
=56.4×6.5-6.5×34.4
=(56.4-34.4)×6.5
=22×6.5
=143
.
=56.4×6.5-6.5×34.4
=(56.4-34.4)×6.5
=22×6.5
=143
.
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