怎样简便就怎样计算63+152+137+148=102×99=645-180-245=382×101-382=125×24=35×8+35×6-4×35=1280÷
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解决时间 2021-12-20 19:04
- 提问者网友:斑駁影
- 2021-12-19 21:45
怎样简便就怎样计算 63+152+137+148=102×99=645-180-245=382×101-382=125×24=35×8+35×6-4×35=1280÷16÷4=890-147-53=32×25×125=
最佳答案
- 五星知识达人网友:煞尾
- 2021-12-19 23:00
解:①63+152+137+148,
=(63+137)+(148+152),
=200+300,
=500;
②102×99,
=(100+2)×99,
=9900+198,
=10098;
③645-180-245,
=(645-245)-180,
=400-180,
=220;
④382×101-382,
=382×(101-1)
=382×100,
=38200;
⑤125×24,
=(125×8)×3,
=1000×3,
=3000;
⑥35×8+35×6-4×35,
=35×(8+6-4),
=35×10,
=350;
⑦1280÷16÷4,
=1280÷(16×4),
=1280÷64,
=20;
⑧890-147-53,
=890-(147+53),
=890-200,
=690;
⑨32×25×125,
=(25×4)×(125×8),
=100×1000,
=100000.解析分析:①运用加法的结合律及交换率进行解答即可.②④⑥运用乘法的分配律进行解答即可.③⑧运用一个数减去两个数,可以用这个数减去这两个数的和进行解答即可.⑤⑨运用乘法的结合律及交换率进行解答即可.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.
=(63+137)+(148+152),
=200+300,
=500;
②102×99,
=(100+2)×99,
=9900+198,
=10098;
③645-180-245,
=(645-245)-180,
=400-180,
=220;
④382×101-382,
=382×(101-1)
=382×100,
=38200;
⑤125×24,
=(125×8)×3,
=1000×3,
=3000;
⑥35×8+35×6-4×35,
=35×(8+6-4),
=35×10,
=350;
⑦1280÷16÷4,
=1280÷(16×4),
=1280÷64,
=20;
⑧890-147-53,
=890-(147+53),
=890-200,
=690;
⑨32×25×125,
=(25×4)×(125×8),
=100×1000,
=100000.解析分析:①运用加法的结合律及交换率进行解答即可.②④⑥运用乘法的分配律进行解答即可.③⑧运用一个数减去两个数,可以用这个数减去这两个数的和进行解答即可.⑤⑨运用乘法的结合律及交换率进行解答即可.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.
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- 1楼网友:duile
- 2021-12-20 00:10
这下我知道了
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