1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 578 · 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. 2.792 + 297 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.Do the 1089 trick with 321: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 762. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 813. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.297 + 792 =
9. 9.891 + 198 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.198 + 891 =
12. 12.Take 710. 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 6. What is that number?
14. 14.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 724: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 134: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 702. 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 1. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
23. 23.Take 398. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 337. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 106. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.594 + 495 =
30. 30.396 + 693 =
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
32. 32.Take 884. 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 2. What is that number?
34. 34.Do the 1089 trick with 831: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 579: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 461. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 225. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 138. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?

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