Odpowiedź:
1:
1/4 + 0,125= 1/4 + 125/1000 = 1/4 + 1/8 = 2/8 + 1/8 = 3/8
4,4*1 4/11= 4 4/10 * 1 4/11 = 4 2/5 * 1 4/11 = 22/5 * 15/11 = 2/5 * 15/1 = 30/5 = 6
5/6 - 0,4=5/6 - 4/10 = 5/6 - 2/5 = 25/30 - 12/30 = 13/30
4,8: 8/25= 4 8/10 : 8/25 = 4 4/5 : 8/25 = 24/5 : 8/25 = 24/5 * 25/8 = 3/1 * 5/1 = 3 * 5 = 15
2:
(-3) *(-2 1/5)= (-3/1) * (-11/5) = 33/5 = 6 3/5
8,4: (-0,4) = 8 2/5 : (-2/5) = 42/5 * (-5/2) = -21
-7,4-3,2= -10,6
1 5/11- (- 6/11) = 16/11 + 6/11 = 22/11 = 2
