1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 933 · 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. 1.891 + 198 =
2. 2.792 + 297 =
3. 3.Do the 1089 trick with 843: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.198 + 891 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
9. 9.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 940. Reverse its digits and take the smaller number away from the bigger one. 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 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.297 + 792 =
15. 15.693 + 396 =
16. 16.Take 603. 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 4. What is that number?
18. 18.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
21. 21.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 220: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 922: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 993. 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 2. What is that number?
27. 27.Do the 1089 trick with 722: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.594 + 495 =
29. 29.396 + 693 =
30. 30.891 + 198 =
31. 31.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 507: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 794: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 803: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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