1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 202 · 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 289. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.693 + 396 =
3. 3.396 + 693 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
7. 7.Take 417. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.792 + 297 =
11. 11.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 503. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 542: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 997. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
18. 18.891 + 198 =
19. 19.Take 580. 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 2. What is that number?
21. 21.Take 345. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 573: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.297 + 792 =
24. 24.Do the 1089 trick with 907: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
27. 27.Take 277. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 995. 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 3. What is that number?
30. 30.Take 260. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 176. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 541: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
35. 35.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 377: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.198 + 891 =
39. 39.Take 521. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 401: reverse and subtract, then reverse that answer and add. What do you get?

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