问题
解答题
用简便方法计算.
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答案
(1)59+134+41,
=(59+41)+134,
=100+134,
=234;
(2)36×25,
=9×4×25,
=9×(4×25),
=9×100,
=900;
(3)45×9×4,
=45×4×9,
=180×9,
=1620.
用简便方法计算.
|
(1)59+134+41,
=(59+41)+134,
=100+134,
=234;
(2)36×25,
=9×4×25,
=9×(4×25),
=9×100,
=900;
(3)45×9×4,
=45×4×9,
=180×9,
=1620.