1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 332 · 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. 1.792 + 297 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.891 + 198 =
5. 5.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 678. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 531: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 204. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 604. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 994. 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. 12.495 + 594 =
13. 13.693 + 396 =
14. 14.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
17. 17.594 + 495 =
18. 18.Take 113. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 116. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 391. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 196. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 257: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
27. 27.Take 471. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 975: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 976. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.297 + 792 =
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
34. 34.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 419. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 305. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 265. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 522. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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