1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 37 · 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.Take 104. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.495 + 594 =
5. 5.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.Do the 1089 trick with 549: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 814. 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 2. What is that number?
11. 11.891 + 198 =
12. 12.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 641. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 469. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 916. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.594 + 495 =
23. 23.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.297 + 792 =
25. 25.Take 769. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.396 + 693 =
28. 28.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 481: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.198 + 891 =
31. 31.Take 440. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 355. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 369: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 822. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 368: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.792 + 297 =
39. 39.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 926: reverse and subtract, then reverse that answer and add. What do you get?

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