1) 7/12 + (-0,35) = 7/12 - 0,35 ≈ 0,582) -0,375 + 3/8 = -0,375 + 0,375 = 03) -4/21 + 3/14 = -4/21 + 6/42 = -4/21 + 3/21 = -1/214) 1,3 + (-1 7/15) = 1,3 - 22/15 = 1,3 - 1,47 = -0,175) 4 5/9 + (-4 4/15) = 4 + 5/9 - 4 - 4/15 = 5/9 - 4/15 = 25/45 - 12/45 = 13/456) -2 4/75 + 3,0,7 = -2 - 4/75 + 0,7 = -2 - 4/75 + 7/10 = -20/10 - 4/75 + 42/75 = -20/10 - 4/75 + 42/75 = -40/75 - 4/75 + 42/75 = -2/75 + 42/75 = 40/75 = 8/15
1) 7/12 + (-0,35) = 7/12 - 0,35 ≈ 0,58
2) -0,375 + 3/8 = -0,375 + 0,375 = 0
3) -4/21 + 3/14 = -4/21 + 6/42 = -4/21 + 3/21 = -1/21
4) 1,3 + (-1 7/15) = 1,3 - 22/15 = 1,3 - 1,47 = -0,17
5) 4 5/9 + (-4 4/15) = 4 + 5/9 - 4 - 4/15 = 5/9 - 4/15 = 25/45 - 12/45 = 13/45
6) -2 4/75 + 3,0,7 = -2 - 4/75 + 0,7 = -2 - 4/75 + 7/10 = -20/10 - 4/75 + 42/75 = -20/10 - 4/75 + 42/75 = -40/75 - 4/75 + 42/75 = -2/75 + 42/75 = 40/75 = 8/15