1) 242 – 63 – 37 = 242 –  (63+37) = 242 - 100 = 142;
2) 761 – 46 – 314 = 761 –  (46+314) = 761 - 360 = 401;
3) 436 – 209 – 121 = 436 – (209+121) = 436 - 330 = 106.
Вычислите, выбирая удобный порядок выполнения действий.
1) 87 – 49 – 27 = 60 –  49 = 11;
2) 120 – 64 – 36 = 120 – (64+36) = 120 - 100 = 20;
3) 88 – 53 – 18 = 70 –  53 = 17 ;
4) 43 – 15 – 25 = 43 – (15+25) = 43- 40 = 3 .