问题
解答题
估算.
|
答案
(1)82×8,
≈80×8,
=640;
(2)396×6,
≈400×6,
=2400;
(3)608×7,
≈600×7,
=4200;
(4)685×4,
≈700×4,
=2800.
估算.
|
(1)82×8,
≈80×8,
=640;
(2)396×6,
≈400×6,
=2400;
(3)608×7,
≈600×7,
=4200;
(4)685×4,
≈700×4,
=2800.