100道简便运算带答案简单例题

100道简便运算带答案简单例题1、34×3.535-3.5×34.34

=34×3.5×1.01-3.5×34×1.01

=0

2、8+89+899+8999+89999

=9+90+900+9000+90000-5

=99999-5

=99994

3、0.67×2.1+0.018×21+8.5×0.79

=0.67×2.1+0.18×2.1+8.5×0.79

=（0.67+0.18）×2.1+8.5×0.79

=0.85×2.1+0.85×7.9

=0.85×（2.1+7.9）

=0.85×10

=8.5

4、22222.2×9.99999

=22222.2×（10-0.00001）

=222222-0.222222

=222221.777778

5、1997×19961996-1996×19971997

=1997×1996×10001-1996×1997×10001

6、0.02+0.04+0.06+0.08+……+19.94+19.96+19.98 =（0.02+19.98）×999÷2

=10×999

=9990

7、99999×77778+33333×66666

=99999×77778+99999×22222

=99999×（77778+22222）

=99999×100000

=9999900000

8、（4又5/6-3又3/4）/（3/14+2/7）

=13/12÷1/2

=13/6

=2又1/6

9、（4.8/1又4/5+3又1/2+7又1/3）*4/9

=（2又2/3+7又1/3+3.5）*4/9

=（10+3.5）*4/9

=13.5*4/9

=6

10、17.2/【（3又2/5-1.25）*2/3】

=17.2/【2.15*2/3】

=17.2÷43/3

11、5*5又1/5

=5*5+5*1/5

=25+1

=26

12、（5又2/5-1.8）/[（1.15+13/20）*1又2/3] =3.6/[1.8*5/3]

=3.6/3

=1.2

13、3又5/8*5又1/5+5又1/5*6又3/8

=5.2*(3又5/8+6又3/8）

=5.2*10

=52

14、[3/4-7/8/(5/6+4/5)]*28

=[3/4-7/8÷49/30]*28

=[3/4-15/28]*28

=3/4*28-15/28*28

=21-15

=6

15、(1.25*4/5-0.76)/(1又3/8+1又1/40）

=(1-0.76)/2.4

=0.24/2.4

16、[(0.2+1/3)*4.5]/(8又1/20-6.45）=8/15*4.5/1.6

=2.4/1.6

=1.5

17、8.16-1.26/0.3*1.5

=8.16-4.2*1.5

=8.16-6.3

=1.86

18、8.4*[(1.2+3又1/3）/3.4-1/2]

=8.4*[68/16/3.4-1/2]

=8.4*[5/4-1/2]

=8.4*3/4

=6.3

19、19.38-4又7/8-5又1/8

=1.938-(4又7/8+5又1/8）

=19.38-10

=9.38

20、13又7/13-（6又3/5+3又7/13）=13又7/13-3又7/13-6又3/5

=10-6又3/5

=3.4

21、1又3/4+[2又3/14-（2又3/14-1.875）]/2又1/12

=1又3/4-15/8*12/25

=1又3/4-9/10

=0.85

22、（9.4-8又2/5）/[（1.1+1/15）*1又7/18]

=1/[7/6*25/18]

=1÷175/108

=108/175

23、10÷3.14-6.86÷3.14 =(10-6.86)÷3.14 =3.14÷3.14 =1

24、37.68÷0.25÷4 =37.68÷(0.25×4) =37.68÷1 =37.68

25、3.75－(2.75－1.3) =3.75－2.75＋1.3 =1＋1.3 =2.3

26、37.56－(18＋7.56) =37.56－7.56－18 =30－18 =12 0.77÷14 =0.77÷7÷2 =0.11÷2 =0.055 4.5×9.8

=4.5×(10－0.2) =4.5×10－4.5×0.2 =45－0.9 =44.1 0.7÷0.125 =(0.7×8)÷(0.125×8) =0.56÷1 =0.56 0.7÷0.25

=(0.7×4)÷(0.25×4) =2.8÷1 =2.8

27、2.5×3.2×12.5 =(2.5×0.4)×(8×12.5) =1×100 =100

28、12.5×9.6×0.25

=(12.5×0.8)×3×(4×0.25) =10×3×1 =30

29、3.75－(2.8－1.25) =3.75＋1.25－2.8

=5－2.8 =2.2