1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 688 · 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.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 340: 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 6. What is that number?
4. 4.792 + 297 =
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 856: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 204: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.891 + 198 =
9. 9.Do the 1089 trick with 851: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 822: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 529. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 563. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
18. 18.297 + 792 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.Do the 1089 trick with 641: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 924. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.396 + 693 =
23. 23.Do the 1089 trick with 983: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 991: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
26. 26.Take 441. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 529: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 280. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.594 + 495 =
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
34. 34.Do the 1089 trick with 986: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 538: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 598. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 704. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 107: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 894: reverse and subtract, then reverse that answer and add. What do you get?

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