1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 11 · 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. 1.495 + 594 =
2. 2.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
4. 4.Do the 1089 trick with 146: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.198 + 891 =
6. 6.Take 269. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.792 + 297 =
8. 8.Take 361. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 187. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.891 + 198 =
14. 14.594 + 495 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.Do the 1089 trick with 659: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 587. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 134. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 407. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.297 + 792 =
24. 24.Take 501. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.396 + 693 =
26. 26.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 457: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.693 + 396 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
31. 31.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
35. 35.Do the 1089 trick with 823: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
37. 37.Do the 1089 trick with 862: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 806: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 703. 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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