1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 428 · 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. 1.594 + 495 =
2. 2.396 + 693 =
3. 3.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.Take 397. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 447. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.Take 116. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.297 + 792 =
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
15. 15.Take 385. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 228: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.891 + 198 =
19. 19.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 468. 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 2. What is that number?
22. 22.198 + 891 =
23. 23.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
25. 25.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
28. 28.495 + 594 =
29. 29.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.693 + 396 =
31. 31.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 286: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.792 + 297 =
37. 37.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 518. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 207: reverse and subtract, then reverse that answer and add. What do you get?

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