Question

załącznik proszę o pomoc ;]

Answer 1

4. 2 1/2 : 1 1/4 + 4 4/5 * 3 3/4 =

= 5/2 : 5/4 + 24/5 * 15/4=

= 2 + 18 = 20

 

5. (3 1/4 - 1 3/5) * 1 1/3 / 2 1/5=

= (13/4 - 8/5) * 4/3 / 11/5 = 

= (65/20 - 32/20) * 4/3 / 11/5 =

= 33/20 * 4/3 / 11/5 = 

= 44/20 : 11/5 = 

= 44/20 * 5/11 = 1

 

6. 6 1/4 : 4 5/8 - 3 1/6 / 2 1/3 =

= 25/4 : 37/8 - 19/6 / 7/3 = 

= 25/4 : 222/48 - 152/48 / 7/3 =

= 25/4 : 70/48 : 7/3 = 

= 25/4 : (70/48 : 7/3) = 

= 25/4 : (70/48 * 3/7) = 

= 25/4 : 10/16 = 

= 25/4 * 16/10 =

= 20/2 = 10

 

7. 4,7 + 18,32 + 7,34 + 12,85 + 20,79 =

= 4 7/10 + 18 2/100 + 7 34/100 + 12 85/100 + 20 79/100 = 

= 47/10 + 1832/100 + 734/100 + 1285/100 + 2079/100 = 

470/100 + 1832/100 + 734/100 + 1285/100 + 2079/100 = 

= 6400/100 = 64

 

8. (8,05 - 7,6) * 100 = 

= (8 5/100 - 7 6/10) * 100 = 

= (805/100 - 76/10) * 100 = 

= (805/100 - 760/100) * 100 = 

= 45/100 * 100 = 45

 

9. 38 : 0,95 = 

= 3800 : 95 = 

= 40

 

10. (3,5 + 4 12/20) - 1,02 * 5 =

( 3 5/10 + 92/20) - 1 2/100 * 5 = 

= ( 35/10 + 92/20) - 102/100 * 5 = 

= (70/20 + 92/20) - 102/100 * 5 = 

= 162/20 - 102/100 * 5 = 

= 810/100 - 102/100 * 5 = 

= 708/100 * 5 =

= 708/20 = 35 8/20 = 35 2/5

 

Answer 2

1 1/2:1 1/4+4 4/5*3 3/4=1,5:1,25+4,8*3,75=1,2+18=19,2

 

[(3 1/4-1 3/5 )*1 1/2]:2 1\5=[(3,25-1,6)*1,5]:2,2=(1.65*1,5):2,2=2,475:2,2=1,125

 

6 1/4:[(4 5/8-3 1/6):2 1/3]=24/4:[(4 15/24 -3 4/24):7/3]=24/4:(1 11/24:7/3)=24/4:11/56=336/11=30 6/11

 

4,7+18,32+7,34+12,85+20,79=64

 

(8,05-7,6)*100=0,45*100=45

 

38:0,95=40

 

(3,5+4 12/20)-1,02*5=(3,5+4,6)- 5,1=8,1-5,1=3

 

(7,5-6 3/14)*(2,8:2/5)=(7 1/2- 6 3/14)*(2 4/5:2/5)=(7 7/14-6 3/14)*12=1 4/14*12=1 2/7*12=9/7*12=108/7=15 3/7

 

(-2 1/2)2+(1 1/2)3+1 3/8=(-5/2)2+(3/2)3+1 3/8=25/4 +27/8+1 3/8=6 1/4+3 3/8+1 3/8=6 2/8+4 4/8=10 6/8=10 3/4, np.(-2 1/2)2-do potęgi drugiej

 

72%z 25=0,72*25=18

 

6*0,4+8*0,2=2,4+1,6=4

 

(6--3)-(6+-3)=9-3=6