1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 790 · 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 4. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
4. 4.Take 712. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.693 + 396 =
8. 8.Take 128. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 309: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 562: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 118: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.396 + 693 =
13. 13.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 672: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 339. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
17. 17.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 680: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.297 + 792 =
20. 20.Take 301. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
24. 24.Do the 1089 trick with 386: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 682. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 127: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 247: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 476. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 563: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 942. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 338. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 649: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 280: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.495 + 594 =
37. 37.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
39. 39.Take 652. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.594 + 495 =

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