1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 2 · 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 1. What is that number?
3. 3.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.891 + 198 =
5. 5.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.Do the 1089 trick with 916: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 592: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.396 + 693 =
13. 13.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
15. 15.Do the 1089 trick with 630: 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 3. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
18. 18.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
21. 21.Do the 1089 trick with 115: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 216: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.792 + 297 =
26. 26.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 691: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
30. 30.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 538. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 187: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.297 + 792 =
35. 35.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.693 + 396 =
40. 40.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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