1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 253 · 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.Do the 1089 trick with 135: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 306. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.693 + 396 =
5. 5.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 962. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 603. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
12. 12.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
15. 15.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.594 + 495 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
18. 18.495 + 594 =
19. 19.297 + 792 =
20. 20.Take 974. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.396 + 693 =
22. 22.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
24. 24.Take 389. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 793: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 528. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 662: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.891 + 198 =
30. 30.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 164: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 437. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
36. 36.198 + 891 =
37. 37.Do the 1089 trick with 187: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 503. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 397. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 653: reverse and subtract, then reverse that answer and add. What do you get?

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