问题
解答题
简便方法计算:
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答案
①326+199,
=326+200-1,
=525;
②25×125×32,
=25×125×8×4,
=(25×4)×(125×8),
=100×1000,
=100000;
③43×99,
=43×(100-1),
=43×100-43×1,
=4300-43,
=4257.
简便方法计算:
|
①326+199,
=326+200-1,
=525;
②25×125×32,
=25×125×8×4,
=(25×4)×(125×8),
=100×1000,
=100000;
③43×99,
=43×(100-1),
=43×100-43×1,
=4300-43,
=4257.