小数简便运算练习题300道
小数加减乘除及简便计算习题
一、课堂练习
3.56+4.54+6.44+5.46 5.03-0.25-1.75
4.86+5.24-1.86 8.13+(1.87-0.5)
23.7-1.6-3.7-8.4 87.4-(21.25+17.4) -8.75
14.6-9.9 1.9+1.99+1.999 19.43-(6.72+1.43)
2.69-1.35+3.31-2.65 17.28-3.86-6.14+2.72
5.25+3.76-2.76+4.75 4.5+5.5-4.5+5.5
21.53-(13.64-8.47) 28.49-1.1-2.47-6.43
7.34+2.5+2.66-1.5 3.25+1.79-0.59+1.75
3.79-1.225-(3.775-6.21) 27.38-5.34+2.62-4.66
二、课后练习
4.12+8.59+5.88+1.41 12.87-1.34-2.66
21.53+4.87-2.53 15.21+(4.79-2.8)
12.19-2.6-2.19-3.4 109.72-(5.62+9.72)
21.3-19.9 39.6-(18.31+9.6) -1.69
14.25-2.45+5.75-3.55 24.51-3.14-6.86+4.49
41.25+5.87-3.87+4.65 11.5+8.5-11.5+8.5
8.13-(12.25-11.87) 34.34-2.1-2.35-5.55
81.67+4.17+4.33-2.17 1.35+12.87-1.37+8.65
15.51-3.334-(2.666-4.49) 21.62-4.35+8.38-5.65
小数乘除法简便计算
一、课堂练习
0.125×3.69×8 (2.5-0.25) ×4 8.59×101
0.36×15.7-0.36×13.7 5.64×1.28+8.72×5.64
0.63×199 60÷48 7.73×0.5+2.27÷2
4.37+99×4.37 10.1×38.67-3.867 9.9÷5.5
8.63×25-0.063×250 9.3×10.1 3.99÷0.125÷8
0.99×0.81+0.11×9×0.19 (5.23+5.23+5.23+5.23) ×25
0.25×1.25×0.67×32 2.49×3.8+0.249×62
33.41÷4-3.41×0.25 54.8-0.3×0.3-3.......余下全文>>
100道简便计算题有答案
300÷125÷8
=300÷(125×8)
=300÷1000
=0.3
396-96-172-28
=(396-96)-(172+28)
= 300-200
= 100
125*24
= 125*8*3
= 1000*3
= 3000
26*15
= (20+6)*15
= 20*15 + 6*15
= 300+90
=390
25*99*4
= 25*4*99
= 100*99
= 9900
250*32
= 250*4*8
= 1000*8
= 8000
(98+98+98+98)*25
= 4*98*25
= 4*25*98
= 100*98
= 9800
简便运算大全及答案
常见以下几类题型:
一、运用加法结合律进行简算
(a+b)+c=a+(b+c) 或a+b+c+d=(a+c)+(b+d)
例1、5.76+13.67+4.24+6.33
=(5.76+4.24)+(13.67+6.33)
=10+10
=20
例2、37.24+23.79-17.24
=37.24-17.24+23.79
=20+23.79
=43.79
二、运用乘法结合律进行简算:这种题型往往含特殊数字之间相乘
(a×b)×c=a×(b×c)
特殊数字之间相乘:
25×4=100 125×8=1000 25×8=200 125×4=500
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
2.5×0.125×8×4等,如果遇到除法同样适用,或将除法变为乘法来计算。如:8.3×67÷8.3÷6.7等。
三、利用乘法分配律进行简算:
(a+b)×c=a×c+ b×c
(a-b)×c=a×c- b×c
做这种题,一定不要急着去算,先要分析各数字之间的特殊关系。也就是先要仔细观察,找到做题的窍门。
例5、(2.5+12.5)×40
=2.5×40+12.5×40
=100+500
=600