W.A.L.T: I'm solving subtraction problems using various strategies.
8 14
1.294-167=
14-7=7
80-60=20
200-100=100
100+20+7=127
7 14
2.384-158=
14-8=6
70-50=20
300-100=200
200+20+6=226
6 15 13
3.763-477=
13-7=6
150-70=80
600-400=200
200+80+6=286
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