用简便方法计算
102×47?????????????69×96-96×59?????????????24×25.
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解:(1)102×47,
=(100+2)×47,
=100×47+2×47,
=4700+94,
=4794;
(2)69×96-96×59,
=96×(69-59),
=96×10,
=960;
(3)24×25,
=6×4×25,
=6×(4×25),
=6×100,
=600.
解析分析:(1)把102看作100+2,运用乘法分配律简算;
(2)运用乘法分配律简算;
(3)把24看作6×4,运用乘法结合律简算.
点评:完成本题,要注意分析式中数据,运用合适的简便方法计算.