1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 116 · 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. 1.396 + 693 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.Do the 1089 trick with 704: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.297 + 792 =
6. 6.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 133: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
12. 12.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 306. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.891 + 198 =
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
18. 18.Take 702. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 340. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 123. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 723. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 482. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.198 + 891 =
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
27. 27.Take 216. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
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 175: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 995. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 975. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.693 + 396 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
36. 36.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 247. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
39. 39.Do the 1089 trick with 751: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?

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