1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 657 · 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.Take 813. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 794. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 613. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 743: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
9. 9.Take 587. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.693 + 396 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.Do the 1089 trick with 729: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.792 + 297 =
14. 14.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.891 + 198 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.Do the 1089 trick with 503: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 366. 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 3. What is that number?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
21. 21.Do the 1089 trick with 496: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 694: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 107: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 946. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.297 + 792 =
27. 27.396 + 693 =
28. 28.Take 881. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
31. 31.Do the 1089 trick with 196: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 672. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 315. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.594 + 495 =
37. 37.Do the 1089 trick with 942: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 321. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 882. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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