7.8+4.87+2.2怎样简算?
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![7.8+4.87+2.2怎样简算?](/uploads/image/z/30959-71-9.jpg?t=7.8%2B4.87%2B2.2%E6%80%8E%E6%A0%B7%E7%AE%80%E7%AE%97%3F)
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7.8+4.87+2.2怎样简算?
7.8+4.87+2.2怎样简算?
7.8+4.87+2.2怎样简算?
7.8+2.2+4.87=10+4.87=14.87
先算后面七点八加二点二等于10
10加4.87=14.87
7.8+2.2=10 10+4.87=14.87