简便算法练习题

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

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