1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 650 · 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 448. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 154. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 901. 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 8. What is that number?
5. 5.Take 583. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 146: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.495 + 594 =
8. 8.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Take 135. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
14. 14.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 199. 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 1. What is that number?
17. 17.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 301. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 280: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.891 + 198 =
24. 24.594 + 495 =
25. 25.Do the 1089 trick with 834: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 497: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 237. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.198 + 891 =
30. 30.Do the 1089 trick with 892: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 642. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.297 + 792 =
34. 34.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 289: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.396 + 693 =
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
38. 38.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 137. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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