1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 119 · 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.Take 749. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 461: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.396 + 693 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
9. 9.792 + 297 =
10. 10.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
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 745: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
16. 16.594 + 495 =
17. 17.891 + 198 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
19. 19.Take 157. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.297 + 792 =
24. 24.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 407: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.693 + 396 =
31. 31.Do the 1089 trick with 614: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 719: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.495 + 594 =
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?

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