1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 624 · 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. 1.891 + 198 =
2. 2.Do the 1089 trick with 832: 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 7. What is that number?
4. 4.396 + 693 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.Do the 1089 trick with 513: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.792 + 297 =
8. 8.Take 108. 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 2. What is that number?
10. 10.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
12. 12.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
14. 14.198 + 891 =
15. 15.Do the 1089 trick with 672: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.297 + 792 =
17. 17.Do the 1089 trick with 709: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 942. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 995: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 367. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 426. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
25. 25.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
28. 28.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 156. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.495 + 594 =
32. 32.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 507. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 851: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.693 + 396 =
38. 38.594 + 495 =
39. 39.Do the 1089 trick with 912: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 831: reverse and subtract, then reverse that answer and add. What do you get?

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