问题
解答题
估算下面各题.
|
答案
(1)59×42≈2400, | (2)32×61≈1800, | (3)993×19≈20000, |
(4)45×99≈4500, | (5)185×31≈6000, | (6)28×71≈2100, |
估算下面各题.
|
(1)59×42≈2400, | (2)32×61≈1800, | (3)993×19≈20000, |
(4)45×99≈4500, | (5)185×31≈6000, | (6)28×71≈2100, |