1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 537 · 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 460: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 861: 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 2. What is that number?
4. 4.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.Take 603. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 638: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
15. 15.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 124. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.396 + 693 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
19. 19.891 + 198 =
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 148: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 356: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 462. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 563. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 269: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
31. 31.495 + 594 =
32. 32.Do the 1089 trick with 406: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 688. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 752: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.594 + 495 =
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
37. 37.Take 376. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.198 + 891 =
39. 39.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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