2.2×12.5+7.8×12.5 7.98×0.02×5 简便计算
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2.2×12.5+7.8×12.5 7.98×0.02×5 简便计算
![2.2×12.5+7.8×12.5 7.98×0.02×5 简便计算](/uploads/image/z/3546447-15-7.jpg?t=2.2%C3%9712.5%2B7.8%C3%9712.5+7.98%C3%970.02%C3%975+%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
2.2×12.5+7.8×12.5
=12.5×(2.2+7.8)
=12.5×10
=125
7.98×0.02×5
=7.98×(0.02×5)
=7.98×0.1
=0.798
=12.5×(2.2+7.8)
=12.5×10
=125
7.98×0.02×5
=7.98×(0.02×5)
=7.98×0.1
=0.798