用简便方法计算:1.2×198-9.8×12 12.6÷(5.76-2.96)×1.6
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![用简便方法计算:1.2×198-9.8×12 12.6÷(5.76-2.96)×1.6](/uploads/image/z/333409-49-9.jpg?t=%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%EF%BC%9A1.2%C3%97198-9.8%C3%9712+12.6%C3%B7%EF%BC%885.76-2.96%EF%BC%89%C3%971.6)
用简便方法计算:1.2×198-9.8×12 12.6÷(5.76-2.96)×1.6
用简便方法计算:1.2×198-9.8×12 12.6÷(5.76-2.96)×1.6
用简便方法计算:1.2×198-9.8×12 12.6÷(5.76-2.96)×1.6
1.原式=1.2×198-98×1.2=1.2×(198-98)=1.2×100=120
另 2题后面是否有中括号