问题 解答题

估算了(写出估算过程)

49×304824×39 81×298106×41.

答案

(1)49×304,

≈50×300,

=15000;

(2)824×39,

≈800×40,

=32000;

(3)81×298,

≈80×300,

=24000;

(4)106×41,

=100×40,

=4000.

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