Question

4,8 + 1/3*(1,2-0,6)=

3,2:(0,8-2/5)=

2/3*(1/2-1/6)

123:10+0,2*6,1=

(3/4-1/5):1/2

(1-7/9)*(5,2-0,7)

Answer 1

4,8 + 1/3*(1,2-0,6)= 4,8+1/3*6/10 = 4,8+0,2 = 5

3,2:(0,8-2/5)= 3,2:(0,8-0,4) = 3,2:0,4 = 8

2/3*(1/2-1/6) = 2/3*(3/6-1/6) = 2/3*2/6 = 4/12 = 1/3

123:10+0,2*6,1= 12,3+1,22 = 13,52

(3/4-1/5):1/2 = (15/20-4/20)*2 = 11/20 * 2 = 22/20 = 1 2/20 =1 1/10 = 1,1

(1-7/9)*(5,2-0,7) = 2/9 * 4,5 = 2/9 * 45/10 [skracamy 45 i 9 przez 9 oraz 2 i 10 przez 2] = 1*1 = 1

Answer 2

a. 4,8 + 1/3*(1,2-0,6)= 4,8 + 1/3 * 0,6 = 4 8/10 + 1/3 * 3/5 = 4 8/10 + 3/15 = 48/10 + 3/15 = 144/30 + 6/30 = 150/30 = 5

 

b. 3,2:(0,8-2/5)= 3,2 : (0,8 - 2/5) = 3,2 : (4/5 - 2/5) = 3 1/5 : 2/5 = 16/5 * 5/2 = 8

c. 2/3*(1/2-1/6) = 2/3 * (3/6 - 1/6) = 2/3 * 2/6 = 2/9

d. 123:10+0,2*6,1= 12,3 + 1, 22 = 13, 52

e. (3/4-1/5):1/2 = (15/20 - 4/20) :1/2 = 11/20 * 2/1 = 11/10 = 1 1/10

f. (1-7/9)*(5,2-0,7) = (9/9 - 7/9) * (5 1/5 - 7/10) = 2/9 * (26/5 - 7/10) = 2/9 * ( 104/20 - 14/20) 2/9 * 90/20 = 1