1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 293 · 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. 1.792 + 297 =
2. 2.594 + 495 =
3. 3.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.495 + 594 =
5. 5.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
9. 9.396 + 693 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
13. 13.Take 447. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 719. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
16. 16.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 367: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
21. 21.Take 902. 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.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 159. 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 4. What is that number?
26. 26.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 541. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.891 + 198 =
30. 30.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.198 + 891 =
34. 34.Take 275. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.693 + 396 =
36. 36.Do the 1089 trick with 804: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 260: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 250: reverse and subtract, then reverse that answer and add. What do you get?

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