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用简便方法计算.125×3298×6689×101.
题目详情
用简便方法计算.
125×32
98×66
89×101.
125×32
98×66
89×101.
▼优质解答
答案和解析
(1)125×32
=(125×8)×4
=1000×4
=4000;
(2)98×66
=(100-2)×66
=100×66-2×66
=6600-132
=6468;
(3)89×101
=89×100+89
=8900+89
=8989.
=(125×8)×4
=1000×4
=4000;
(2)98×66
=(100-2)×66
=100×66-2×66
=6600-132
=6468;
(3)89×101
=89×100+89
=8900+89
=8989.
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