Froggy Jumps optellen en aftrekken met negatieve getallenOnline version optellen en aftrekken met negatieve getallen by Pien 1 8 - 4 = a 4 b 3 c 5 2 3 - 8 = a -5 b -2 c -4 3 -4 + 7 = a -11 b 11 c 3 4 -5 - 3 = a 8 b -8 c 2 5 -7 + 8 = a -15 b 2 c 1 6 7 - 9 = a -1 b -2 c -3 7 -5 + 9 = a 3 b -14 c 4 8 -5 + 5 = a -10 b 0 c 10