Վարժ 525
60, 70, 80, 90:
Վարժ 526
1) 1000 – ( 750 – 250 – 500 ) = 1000
2) 5500 – (570 – ( 420 ÷ 6)) = 5000
3) 1000 – 6400 ÷ ( 32 ÷ 4 ) = 200
4) 2010 – 3200 ÷ ( 80 × 4 ) = 2000
Վարժ 527


Վարժ 528
20 35 50 65 80
1) 65 — 20 = 45
2) 65 — 35 = 30
3) 80 — 20 = 60
4) 80 — 35 = 45