1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 579 · 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.Do the 1089 trick with 632: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 105: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.297 + 792 =
6. 6.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 428: reverse and subtract, then reverse that answer and add. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
10. 10.Do the 1089 trick with 633: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.891 + 198 =
12. 12.594 + 495 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.Do the 1089 trick with 402: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
16. 16.Take 461. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
19. 19.396 + 693 =
20. 20.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 154. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 481. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 104. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.495 + 594 =
27. 27.Do the 1089 trick with 396: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 830: 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.Take 228. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 270. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 611: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 321: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 346: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.198 + 891 =
40. 40.Take 702. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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