1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 211 · 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.Take 346. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 119. Reverse its digits and take the smaller number away from the bigger one. 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 632: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.693 + 396 =
6. 6.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.594 + 495 =
8. 8.Do the 1089 trick with 754: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 588. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.792 + 297 =
11. 11.Take 137. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.198 + 891 =
13. 13.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 196: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 732. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
20. 20.Do the 1089 trick with 391: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
22. 22.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 805: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.396 + 693 =
25. 25.Take 681. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 982. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
31. 31.Take 856. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 592: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 448: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 539: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 571. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 103. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 955: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 452: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?

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