1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 214 · 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 3. What is that number?
3. 3.Take 522. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 567: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 876. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.594 + 495 =
15. 15.693 + 396 =
16. 16.Take 208. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
19. 19.Take 246. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
24. 24.891 + 198 =
25. 25.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.297 + 792 =
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
28. 28.Take 852. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 942. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
32. 32.Do the 1089 trick with 560: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 437: 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 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 618. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 955: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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