1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 725 · 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. 1.198 + 891 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
4. 4.Take 883. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
6. 6.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.891 + 198 =
9. 9.594 + 495 =
10. 10.Take 247. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 168. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 702: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.792 + 297 =
19. 19.Do the 1089 trick with 891: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 886: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
23. 23.297 + 792 =
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
25. 25.495 + 594 =
26. 26.Take 440. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.693 + 396 =
28. 28.Do the 1089 trick with 906: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 977. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 641. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 124: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
33. 33.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 274: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
38. 38.Take 419. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 357: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?

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