5.62+6.2÷2.5简便方法?
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5.62+6.2÷2.5
=5.62+(62/10)/(25/10)
=5.62+(62/10)×(10/25)
=5.62+(62×10)/(25×10)
=5.62+62/25
=5.62+(62×4)/(25×4)
=5.62+[(60+2)×4]/[(20+5)×4]
=5.62+(60×4+2×4)/(20×4+5×4)
=5.62+(240+8)/(80+20)
=5.62+248/100
=5.62+2.48
=(5+0.6+0.02)+(2+0.4+0.08)
=5+0.6+0.02+2+0.4+0.08
=(5+2)+(0.6+0.4)+(0.02+0.08)
=7+1+0.1
=8+0.1
=8.1
=5.62+(62/10)/(25/10)
=5.62+(62/10)×(10/25)
=5.62+(62×10)/(25×10)
=5.62+62/25
=5.62+(62×4)/(25×4)
=5.62+[(60+2)×4]/[(20+5)×4]
=5.62+(60×4+2×4)/(20×4+5×4)
=5.62+(240+8)/(80+20)
=5.62+248/100
=5.62+2.48
=(5+0.6+0.02)+(2+0.4+0.08)
=5+0.6+0.02+2+0.4+0.08
=(5+2)+(0.6+0.4)+(0.02+0.08)
=7+1+0.1
=8+0.1
=8.1
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