1.

2. ! , , . , , . 7 500. , . 8 000 . 7 500, 500 . 3. !8000 7500 = 500 4. ? . = , , .8 000 - 7 500 = 500 8 000 - (7 500 + 300) = 8 000 7 800 = 200 (500 - 300) 5. ? . = , 500 8 000 - 7 .= 500 8 000 - (7 500 - 200) = 8 000 7 300 = 700 (500 + 200) 6. !8-3=5 7. 8 3 ?8 (3 - 1) = (5 +1)83=5 83=58 (3 1) = 8 2 = 6, 5 + 1 8. : ... 10 4 = 610 (4 2) = 10 2 = 8 2. 8 - 6 = 2.: , .a (b x) = (c + x) 9. 8 3 ?8 (3 + 1) = (5 - 1)83=583=5 8 (3 + 1) = 8 4 = 4, 5 - 1 10. : ... 10 4 = 610 (4 + 2) = 10 6 = 4 2. 6 - 4 = 2.: , .a (b + x) = (c - x) 11. 1. 250, ? 250. (b + 250) = (c - 250)2. , 400? 400. (b - 400) = (c + 400)3. : 3 800 3 800 3 800 3 8003 8003 800 800 700 600 500400300 3 0003 100 3 200 3 3003 4003 5004. b = 4000, :a) a - (b + 45) = 4000 - 45 = 3955a) a - (b + 45) =6. :b) a - (b + 100) = 4000 100 = 3900 7 390 1 796 = 5 594 7 390 (1 796 + ) = 5 6005. . . = ___________________________ 5 600 - 5 594 = 630 000 5 000 = 25 00030 000 (5 000 200) = _________________________25 000 + 200 = 25 200 12. : 2 850, 2 850 _________ ___________. 1 345, 1 345___________ ___________.2. 5 624. , 84? 5 624 - 84 = 5 540: ______________________________________________________________________ 84.: _______________________________________________________________________ 8 750 b = 6 890 8 750 (b 270) = 6 890 + 270 = 7 160