1. - 2/3+ 6 4/5= 6 4/5 - 2/3 = 6 12/15- 10/15 = +6 2/15
-5/6 + -2 3/10= 25/30 +2 9/30= - 2 34/30 = -3 4/30 = -3 2/15
+6 2/15 + -3 2/15 = + 3
2.- 5/8+ - 2 6/10= 25/40 + 2 24/40 = -2 49/40 = - 3 9/40
-4 7/8+ - 3 2/5= 4 35/40+ 3 16/40 = - 7 51 /40= - 8 11/40
-3 9/40 + - 8 11/40= - 11 20/40 = -11 1/2
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1. - 2/3+ 6 4/5= 6 4/5 - 2/3 = 6 12/15- 10/15 = +6 2/15
-5/6 + -2 3/10= 25/30 +2 9/30= - 2 34/30 = -3 4/30 = -3 2/15
+6 2/15 + -3 2/15 = + 3
2.- 5/8+ - 2 6/10= 25/40 + 2 24/40 = -2 49/40 = - 3 9/40
-4 7/8+ - 3 2/5= 4 35/40+ 3 16/40 = - 7 51 /40= - 8 11/40
-3 9/40 + - 8 11/40= - 11 20/40 = -11 1/2