1) 2/15 + (-3/10) = 4/30 - 9/30 = -5/30 = -1/62) -2/3 + 13/15 = -10/15 + 13/15 = 3/15 = 1/53) 13/16 + (-9/32) = 26/32 - 9/32 = 17/324) -4 5/9 + (-7 1/6) = -4 - 7 - 5/9 - 1/6 = -11 6/18 - 3/18 = -11 9/18 = -11 1/25) -5 7/8 + (-6 3/10) = -5 - 6 - 7/8 - 3/10 = -11 - 13/8 - 3/10 = -11 - 26/8 - 3/10 = -12 16/10 - 3/10 = -12 13/10 = -14 3/106) -5 13/18 + 12 11/12 = -5 + 12 - 13/18 - 11/12 = 7 - 39/36 - 33/36 = 7 - 72/36 = 7 - 2 = 57) -13 + 7 3/16 = -13 + 7 + 3/16 = -6 + 3/16 = -6 3/168) -2 3/8 + (-1 5/9) = -2 - 1 - 3/8 - 5/9 = -3 - 24/72 - 40/72 = -3 - 64/72 = -3 - 8/12 = -3 - 2/3 = -3 2/39) -8 + 4 5/22 = -8 + 4 + 5/22 = -4 + 5/2210) -2 9/20 + 5 7/30 = -2 + 5 - 9/20 - 7/30 = 3 - 54/60 - 42/60 = 3 - 96/60 = 3 - 1 36/60 = 1 - 36/60 = 1 - 3/5 = 2/511) -5 1/4 + 1 3/8 = -5 + 1 - 1/4 + 3/8 = -4 - 2/8 + 3/8 = -4 + 1/8 = -4 1/8 = -4 1/812) 4 3/7 + (-8 9/14) = 4 - 8 + 3/7 - 9/14 = -4 + 6/14 - 9/14 = -4 - 3/14 = -4 3/14 = -4 3/14
1) 2/15 + (-3/10) = 4/30 - 9/30 = -5/30 = -1/6
2) -2/3 + 13/15 = -10/15 + 13/15 = 3/15 = 1/5
3) 13/16 + (-9/32) = 26/32 - 9/32 = 17/32
4) -4 5/9 + (-7 1/6) = -4 - 7 - 5/9 - 1/6 = -11 6/18 - 3/18 = -11 9/18 = -11 1/2
5) -5 7/8 + (-6 3/10) = -5 - 6 - 7/8 - 3/10 = -11 - 13/8 - 3/10 = -11 - 26/8 - 3/10 = -12 16/10 - 3/10 = -12 13/10 = -14 3/10
6) -5 13/18 + 12 11/12 = -5 + 12 - 13/18 - 11/12 = 7 - 39/36 - 33/36 = 7 - 72/36 = 7 - 2 = 5
7) -13 + 7 3/16 = -13 + 7 + 3/16 = -6 + 3/16 = -6 3/16
8) -2 3/8 + (-1 5/9) = -2 - 1 - 3/8 - 5/9 = -3 - 24/72 - 40/72 = -3 - 64/72 = -3 - 8/12 = -3 - 2/3 = -3 2/3
9) -8 + 4 5/22 = -8 + 4 + 5/22 = -4 + 5/22
10) -2 9/20 + 5 7/30 = -2 + 5 - 9/20 - 7/30 = 3 - 54/60 - 42/60 = 3 - 96/60 = 3 - 1 36/60 = 1 - 36/60 = 1 - 3/5 = 2/5
11) -5 1/4 + 1 3/8 = -5 + 1 - 1/4 + 3/8 = -4 - 2/8 + 3/8 = -4 + 1/8 = -4 1/8 = -4 1/8
12) 4 3/7 + (-8 9/14) = 4 - 8 + 3/7 - 9/14 = -4 + 6/14 - 9/14 = -4 - 3/14 = -4 3/14 = -4 3/14