小学四年级简便计算题大全及答案
推荐于2018-02-26 · 知道合伙人教育行家
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小学四年级简便计算题大全及答案例
1、5.76+13.67+4.24+6.33
=(5.76+4.24)+(13.67+6.33)
=10+20
=30
例2、37.24+23.79-17.24
=37.24-17.24+23.79
=20+23.79
=43.79
例3、 4×3.78×0.25
=4×0.25×3.78
=1×3.78
=3.78
例4、 125×246×0.8
=125×0.8×246
=100×246
=24600
例5、(2.5+12.5)×40
=2.5×40+12.5×40
=100+500
=600
例6、3.68×4.79+6.32×4.79
=(3.68+6.32)×4.79
=10×4.79
=47.9
例7. 26.86×25.66-16.86×25.66
=(26.86-16.86) ×25.66
=10×25.66
=256.6
例8、 5.7×99+5.7
= 5.7×(99+1)
=5.7×100
=570
例9、34×9.9
=34×(10-0.1)
=34×10-34×0.1
=340-3.4
=336.6
例10、 57×101
=57×(100+1)
=57×100+57×1
=5757
1、5.76+13.67+4.24+6.33
=(5.76+4.24)+(13.67+6.33)
=10+20
=30
例2、37.24+23.79-17.24
=37.24-17.24+23.79
=20+23.79
=43.79
例3、 4×3.78×0.25
=4×0.25×3.78
=1×3.78
=3.78
例4、 125×246×0.8
=125×0.8×246
=100×246
=24600
例5、(2.5+12.5)×40
=2.5×40+12.5×40
=100+500
=600
例6、3.68×4.79+6.32×4.79
=(3.68+6.32)×4.79
=10×4.79
=47.9
例7. 26.86×25.66-16.86×25.66
=(26.86-16.86) ×25.66
=10×25.66
=256.6
例8、 5.7×99+5.7
= 5.7×(99+1)
=5.7×100
=570
例9、34×9.9
=34×(10-0.1)
=34×10-34×0.1
=340-3.4
=336.6
例10、 57×101
=57×(100+1)
=57×100+57×1
=5757
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交换律;
结合律;
乘法分配律;
提取公因式;
拆分法。
1.交换律:
256+78-56=256-56+78=200+78=278
450×9÷50=450÷50×9=9×9=81
2.结合律:
73+58+27+42=(73+27)+(58+42)=100+100=200
345-67-33=345-(67+33)=345-100=245 789-133+33=789-(133-33)=789-100=689
510÷17 ÷3=51÷(17×3)=510÷51=10 1200÷48×4=1200÷(48÷4)=1200÷12=100
3.乘法分配律:
74 x (10+5)=74 x 10+74 x 5=740+370=1100
45×(10+2)=45×10+45×2=450+90=540
4.提取公因式:
35×78+22×35=35×(78+22)=35×100=3500
28 x 62+38 x 28=(62+38)x 28=100 x 28=2800
5.拆分法:
32×125×25=8×4×125×25=(8×125)×(4×25)=1000×100=100000
36×25=9×4×25=9×(4×25)=9×100=900
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1、5.76+13.67+4.24+6.33
=(5.76+4.24)+(13.67+6.33)
=10+20
=30
例2、37.24+23.79-17.24
=37.24-17.24+23.79
=20+23.79
=43.79
例3、 4×3.78×0.25
=4×0.25×3.78
=1×3.78
=3.78
例4、 125×246×0.8
=125×0.8×246
=100×246
=24600
例5、(2.5+12.5)×40
=2.5×40+12.5×40
=100+500
=600
例6、3.68×4.79+6.32×4.79
=(3.68+6.32)×4.79
=10×4.79
=47.9
例7. 26.86×25.66-16.86×25.66
=(26.86-16.86) ×25.66
=10×25.66
=256.6
例8、 5.7×99+5.7
= 5.7×(99+1)
=5.7×100
=570
例9、34×9.9
=34×(10-0.1)
=34×10-34×0.1
=340-3.4
=336.6
例10、 57×101
=57×(100+1)
=57×100+57×1
=5757
推荐于 2018-02-26
查看全部7个回答
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=(5.76+4.24)+(13.67+6.33)
=10+20
=30
例2、37.24+23.79-17.24
=37.24-17.24+23.79
=20+23.79
=43.79
例3、 4×3.78×0.25
=4×0.25×3.78
=1×3.78
=3.78
例4、 125×246×0.8
=125×0.8×246
=100×246
=24600
例5、(2.5+12.5)×40
=2.5×40+12.5×40
=100+500
=600
例6、3.68×4.79+6.32×4.79
=(3.68+6.32)×4.79
=10×4.79
=47.9
例7. 26.86×25.66-16.86×25.66
=(26.86-16.86) ×25.66
=10×25.66
=256.6
例8、 5.7×99+5.7
= 5.7×(99+1)
=5.7×100
=570
例9、34×9.9
=34×(10-0.1)
=34×10-34×0.1
=340-3.4
=336.6
例10、 57×101
=57×(100+1)
=57×100+57×1
=5757
推荐于 2018-02-26
查看全部7个回答
吴磊同款全跃营养,助力宝宝超A成长!新客尝鲜价19.9元限时抢购
美赞臣中国
广告
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568+199 364+236+645
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37x73一37X63=37X(73-63)=37X10=37o
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