1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 617 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
4. 4.Do the 1089 trick with 743: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
6. 6.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 274: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.396 + 693 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.Do the 1089 trick with 876: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
14. 14.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
16. 16.198 + 891 =
17. 17.Take 274. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 135. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 965. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 507: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.297 + 792 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
23. 23.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 794: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 530: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 539. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.693 + 396 =
30. 30.Take 339. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 744. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.891 + 198 =
35. 35.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 956. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 238: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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