1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 95 · 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. 1.495 + 594 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
3. 3.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 693: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 803: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 118: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 943. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 915: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.396 + 693 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
12. 12.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 492: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
17. 17.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 562. 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 6. What is that number?
21. 21.Do the 1089 trick with 379: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.594 + 495 =
24. 24.891 + 198 =
25. 25.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.792 + 297 =
29. 29.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.297 + 792 =
31. 31.693 + 396 =
32. 32.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 854: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 200: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 481: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 134. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 103: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 711. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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