1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 201 · 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 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.693 + 396 =
3. 3.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.891 + 198 =
5. 5.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.396 + 693 =
7. 7.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. 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.Take 429. 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 7. What is that number?
12. 12.Do the 1089 trick with 972: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
16. 16.Do the 1089 trick with 952: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 733: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.792 + 297 =
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
21. 21.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 763: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 386: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
26. 26.594 + 495 =
27. 27.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 764: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.297 + 792 =
32. 32.Take 578. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
36. 36.Do the 1089 trick with 478: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 872: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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