1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 110 · 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. 1.198 + 891 =
2. 2.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.Do the 1089 trick with 438: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.693 + 396 =
6. 6.495 + 594 =
7. 7.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
9. 9.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 977. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.792 + 297 =
12. 12.Take 104. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 126: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 481. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 438. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
21. 21.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.594 + 495 =
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
24. 24.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.297 + 792 =
29. 29.Do the 1089 trick with 451: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
32. 32.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 732. 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 1. What is that number?
36. 36.Take 543. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.396 + 693 =
38. 38.Take 194. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 862: reverse and subtract, then reverse that answer and add. What do you get?

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