1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 555 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.Take 196. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 369. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.693 + 396 =
7. 7.198 + 891 =
8. 8.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.891 + 198 =
10. 10.Take 785. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.297 + 792 =
13. 13.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 519. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
17. 17.Do the 1089 trick with 712: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 113. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 629: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.495 + 594 =
23. 23.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 513: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 247. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 194: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
29. 29.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 331. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 224: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 437: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 972: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.792 + 297 =
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
39. 39.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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