1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 474 · 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 790: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 893. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 854. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 402. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.396 + 693 =
7. 7.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
10. 10.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 429: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 219. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 250: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 663. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.495 + 594 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.Take 439. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.297 + 792 =
21. 21.Take 330. 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 2. What is that number?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
24. 24.693 + 396 =
25. 25.Do the 1089 trick with 367: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
27. 27.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 872: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 804. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.792 + 297 =
32. 32.891 + 198 =
33. 33.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
37. 37.Take 508. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 228: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 783: reverse and subtract, then reverse that answer and add. What do you get?

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