1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 430 · 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. 1.396 + 693 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.594 + 495 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.693 + 396 =
7. 7.Take 805. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.495 + 594 =
9. 9.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.792 + 297 =
11. 11.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.297 + 792 =
13. 13.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.891 + 198 =
15. 15.Take 711. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 128. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 713. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
20. 20.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 319. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
23. 23.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
26. 26.Take 906. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 835. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.198 + 891 =
32. 32.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 133. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
36. 36.Take 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 672. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 442: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?

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