Question

Oblicz:

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

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

3. 2/3 x (1/2-1/6)

4. 4,8+1/3 x (1/2-0,6)

5. (1- 7/9)x(5,2-0,7)

6. 123 : 10 + 0,2 x 6,1

7.(6,5-4,7):(4-2⅕)

Prosze o odp na dzisiaj ;*

takie liczby jak 1/3 to ułamki jak coś

Answer 1

Oblicz: 1. (3/4-1/5):1/2=(0,75-0,20)*2=0,55*2=1,1 2. 3,2:(0,8-2/5)=3,2:(0,8-0,4)=3,2:0,4=32:4=8 3. 2/3 x (1/2-1/6)=2/3*(3/6-1/6)=2/3*2/6=2/9 4. 4,8+1/3 x (1/2-0,6)=4,8+1/3*(-0,1)=4,8-1/30=48/10-1/30=144/30-1/30=143/30=4 i 23/30 5. (1- 7/9)x(5,2-0,7)=2/9*4,5=2/9*45/10=1 6. 123 : 10 + 0,2 x 6,1=12,3+1,22=13,52 7.(6,5-4,7):(4-2⅕)=1,8: 1 i 4/5=18/10*5/9=1

Answer 2

Oblicz:

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

2. 3,2:(0,8-2/5)= 3,20:(0,8-0,4)= 3,20:0,4 = 8

3. 2/3 x (1/2-1/6) = 2/3 * (3/6-1/6) = 2/3 * 2/6 = 4/18 = 2/9

4. 4,8+1/3 x (1/2-0,6) = 24/5 +1/3 * ( 1/2 - 6/10)= 24/5 + 1/3 *(5/10-6/10)= 24/5 + 1/3 * (-1/10) = 24/5 - 1/30 = 144/30-1/30 = 143/30 = 4 23/30

5. (1- 7/9)x(5,2-0,7) = 2/9 * ( 4,50) = 2/9 * 9/2 = 1

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

7.(6,5-4,7):(4-2⅕) = 1,8 : 1 4/5 = 9/5 : 9/5 = 9/5 * 5/9 = 1