1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 940 · 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. 1.495 + 594 =
2. 2.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.594 + 495 =
6. 6.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 183. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 189. 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. 11.297 + 792 =
12. 12.Take 703. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 715: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
15. 15.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.198 + 891 =
17. 17.Do the 1089 trick with 148: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.396 + 693 =
21. 21.Do the 1089 trick with 399: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 681: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 850: 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 3. What is that number?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
27. 27.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
29. 29.Take 803. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 426. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.891 + 198 =
33. 33.Take 783. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 593. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 863: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.792 + 297 =
37. 37.Take 763. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 429: reverse and subtract, then reverse that answer and add. What do you get?

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