Răspuns:
210 - 63 + 4 - 81 + 5 =
147+4-81+5=
151-81+5=
70+5=75
600 - 132 + 6 + 59 - 4=
468+6+59-4=
474+59-4=
533-4=529
436 + 78 - 10 - 193 + 12 =
514-10-194+12=
504-195+12=
309+12=323
157 + 48 - 6- 47 + 20 =
305-6-47+20=
199-47+20=
152+20=172
501 - 240 - 100 - 20 + 5 =
261-100-20+5=
161-20+5=
141+5=146