1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 567 · 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. 1.495 + 594 =
2. 2.198 + 891 =
3. 3.693 + 396 =
4. 4.Do the 1089 trick with 486: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 385. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.891 + 198 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
8. 8.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 629. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 960: 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 8. What is that number?
13. 13.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
18. 18.Do the 1089 trick with 639: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
20. 20.Take 991. 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 186: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 439: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 381. 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 4. What is that number?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
30. 30.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.792 + 297 =
33. 33.Take 562. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 347: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
39. 39.Do the 1089 trick with 147: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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