问题
解答题
估一估,把得数写在横线里.
22+19≈______
53-16≈______
46-7≈______
17+24≈______
98-49≈______.
答案
(1)22+19≈40,
(2)53-16≈30,
(3)46-7≈40,
(4)17+24≈40,
(5)98-49≈50.
故答案为:40,30,40,40,50.
估一估,把得数写在横线里.
22+19≈______
53-16≈______
46-7≈______
17+24≈______
98-49≈______.
(1)22+19≈40,
(2)53-16≈30,
(3)46-7≈40,
(4)17+24≈40,
(5)98-49≈50.
故答案为:40,30,40,40,50.