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)
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takie liczby jak 1/3 to ułamki jak coś
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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