1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 246 · 40 questions

The trick (Reverse and subtract): Reverse the number and take the smaller number away from the bigger one. The answer is always one of 198, 297, 396, 495, 594, 693, 792, 891: middle digit 9, first and last digits adding to 9. Reverse that answer and add: you always get 1089.

1. 1.198 + 891 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
3. 3.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.792 + 297 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.495 + 594 =
8. 8.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 629. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.594 + 495 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
14. 14.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
17. 17.Do the 1089 trick with 538: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
22. 22.891 + 198 =
23. 23.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.693 + 396 =
25. 25.Do the 1089 trick with 113: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 771. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 672. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
31. 31.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 703: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
35. 35.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 533: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 497. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 134. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 168: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?

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