Question

13 1/2-3 1/2:5,25=

6,2+4,8* 5/8=

5,12: (5-2 11/25)=

2do potęgi3-(3,2-1 1/3)=

(12: 3/5-1 1/3* 0,3) :1 1/2=

3,75:(3 5/6+2 1/4)=

(0,76: 4/5- 0,50*2=

Answer 1

13 1/2-3 1/2:5,25= 27/2 - 7/2 : 525/100 = 27/2 - 7/2 : 21/4 = 27/2 - 7/2 * 4/21 = 27/2 - 2/3 = 27/2 - 2/3 = 81/6 - 4/6 = 77/6 = 12 5/6

6,2+4,8* 5/8= 6,2 + 48/10 * 5/8 = 6,2 + 3 = 9,2

5,12: (5-2 11/25)= 5,12 : (5 - 2,44) = 5,12 : 2,56 = 2

2do potęgi3-(3,2-1 1/3)= 8 - (32/10 - 4/3) = 8 - (16/5 - 4/3) = 8 - (48/15 - 20/15) = 8 - 28/15 = 8 - 1 13/15 = 6 30/15 - 1 13/15 = 5 17/15

 (12: 3/5-1 1/3* 0,3) :1 1/2= (12 : 0,6 - 4/3 * 3/10) : 3/2 = (20 - 0,4) * 2/3 = 19,6 * 2/3 = 196/10 * 2/3 = 196/15 = 13  1/15

3,75:(3 5/6+2 1/4)= 3,75 : (23/6 + 9/4) = 3,75 : (46/12 + 27/12) = 3,75 : 73/12 = 375/100 * 12/73 = 15/4 * 12/73 = 45/73

(0,76: 4/5- 0,50*2= 0,76 : 0,8 - 1 = 0,95 - 1 = -0,05