10.64÷(3.7-2.9)简便法
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10.64÷(3.7-2.9)简便法
![10.64÷(3.7-2.9)简便法](/uploads/image/z/18514328-32-8.jpg?t=10.64%C3%B7%283.7-2.9%29%E7%AE%80%E4%BE%BF%E6%B3%95)
10.64÷(3.7-2.9)
=(10+0.64)/[(3.7-2.7)-0.2]
=(10+0.64)/(1-0.2)
=10/0.8+0.64/0.8
=100/8+0.8
=1.25*100/(1.25*8)+0.8
=125/10+0.8
=12.5+0.8
=12.5+1-0.2
=13.5-0.2
=13.3
=(10+0.64)/[(3.7-2.7)-0.2]
=(10+0.64)/(1-0.2)
=10/0.8+0.64/0.8
=100/8+0.8
=1.25*100/(1.25*8)+0.8
=125/10+0.8
=12.5+0.8
=12.5+1-0.2
=13.5-0.2
=13.3