问题
解答题
|
答案
(1)498×21,
≈500×20,
=10000;
(2)878×6,
≈900×6,
=5400;
(3)616×22,
≈600×20,
=12000;
(4)199×19,
≈200×20,
=4000.
|
(1)498×21,
≈500×20,
=10000;
(2)878×6,
≈900×6,
=5400;
(3)616×22,
≈600×20,
=12000;
(4)199×19,
≈200×20,
=4000.