1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 764 · 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. 1.396 + 693 =
2. 2.Do the 1089 trick with 835: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 358. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.Do the 1089 trick with 673: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 650. 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 1. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
10. 10.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 280: 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 2. What is that number?
13. 13.198 + 891 =
14. 14.594 + 495 =
15. 15.495 + 594 =
16. 16.792 + 297 =
17. 17.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.297 + 792 =
19. 19.Take 578. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 782. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 309: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 381. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.693 + 396 =
26. 26.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
29. 29.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 247. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 125: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 268. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
37. 37.Do the 1089 trick with 614: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 582. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 260. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 340. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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