1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 128 · 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. 1.693 + 396 =
2. 2.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
4. 4.Do the 1089 trick with 994: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 488: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.594 + 495 =
10. 10.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.792 + 297 =
12. 12.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 224. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 225: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 331: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 881: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.297 + 792 =
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
22. 22.Do the 1089 trick with 144: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 932: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
26. 26.Take 476. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.891 + 198 =
28. 28.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 751. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.396 + 693 =
31. 31.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
34. 34.198 + 891 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
36. 36.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
38. 38.Do the 1089 trick with 785: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?

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