• 1. (2018五上·阳江月考) 用简便方法计算

  ①5.6×3.9﹣2.6×3.9

  ②1.8×0.9+0.18

  ③63÷0.5÷0.2

  ④12.95×1.1﹣12.95

  ⑤1.2×9.9

  ⑥1.25×0.25×3.2