71 - 65 [ ] 81 - 75

1) 71 - 65 = 6; 81 - 75 = 6. 6 = 6 490 - 340 = 150; 3 * 50 = 150. 150 = 150 4 * 19 = 76; 16 * 6 = 96. 76 < 96 90 : 5 = 18; 9 + 7 = 16. 18 > 16 12 * 2 = 24; 64 : 4 = 16. 24 > 16 2) 280 + 280 = 560; 180 + 340 = 520. 560 > 520 72 : 18 = 4; 80 : 16 = 5. 4 < 5 10 * 70 = 700; 900 - 100 = 800. 700 < 800 75 : 5 = 15; 9 * 3 = 27. 15 < 27 120 : 6 = 20; 180 : 9 = 20. 20 = 20 3) 17 + 45 = 62; 65 - 17 = 48. 62 > 48 95 - 37 = 58; 35 + 3 = 38. 58 > 38 32 : 16 = 2; 57 : 19 = 3. 2 < 3 14 * 6 = 84; 17 * 5 = 85. 84 < 85 18 * 3 = 54; 4 * 16 = 64. 54 < 64 4) 420 + 360 = 780; 900 - 140 = 760. 780 > 760 400 : 4 = 100; 20 * 5 = 100. 100 = 100 5 * 8 = 40; 120 : 4 = 30. 40 > 30 29 + 71 = 100; 18 + 81 = 99. 100 > 99 9 * 30 = 270; 2 * 90 = 180. 270 > 180 5) 870 - 660 = 210; 87 - 66 = 21. 210 > 21 19 * 2 = 38; 3 * 15 = 45. 38 < 45 95 : 5 = 19; 800 : 40 = 20. 19 < 20 2 * 18 = 36; 15 + 27 = 42. 36 < 42 720 : 8 = 90; 30 * 3 = 90. 90 = 90 6) 12 * 6 = 72; 90 - 18 = 72. 72 = 72 60 * 9 = 540; 80 * 6 = 480. 540 > 480 31 + 33 = 64; 7 * 8 = 56. 64 > 56 68 : 4 = 17; 9 + 9 = 18. 17 < 18 830 - 550 = 280; 4 * 70 = 280. 280 = 280