1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 419 · 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.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 614. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.198 + 891 =
5. 5.Take 206. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 920: 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 6. What is that number?
8. 8.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.297 + 792 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
12. 12.Take 288. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 489: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
15. 15.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 714: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 743. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.396 + 693 =
21. 21.Do the 1089 trick with 661: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
23. 23.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.891 + 198 =
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
26. 26.Take 431. 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 5. What is that number?
28. 28.Do the 1089 trick with 953: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 923: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
31. 31.Take 509. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.792 + 297 =
35. 35.Do the 1089 trick with 761: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.495 + 594 =
37. 37.Do the 1089 trick with 933: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 653: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.693 + 396 =
40. 40.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?

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