1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 58 · 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. 2.495 + 594 =
3. 3.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 955. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.297 + 792 =
6. 6.396 + 693 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
9. 9.Take 932. 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 3. What is that number?
11. 11.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 641. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 507. 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 4. What is that number?
16. 16.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.198 + 891 =
19. 19.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
21. 21.Take 557. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
24. 24.Do the 1089 trick with 288: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 267. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 138. Reverse its digits and take the smaller number away from the bigger one. 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.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.693 + 396 =
31. 31.Take 360. 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. 33.891 + 198 =
34. 34.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 764. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 513: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 783. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 903: reverse and subtract, then reverse that answer and add. What do you get?

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