1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 719 · 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.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 219: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 451: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.792 + 297 =
5. 5.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.Do the 1089 trick with 673: 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 1. What is that number?
9. 9.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 851: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.891 + 198 =
12. 12.495 + 594 =
13. 13.Do the 1089 trick with 612: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.198 + 891 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
16. 16.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 427: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 602: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.396 + 693 =
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
21. 21.Take 581. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 438: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
26. 26.Take 369. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 562: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.693 + 396 =
31. 31.Take 177. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 169: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 935. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
37. 37.Do the 1089 trick with 882: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 977: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 741: reverse and subtract, then reverse that answer and add. What do you get?

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