1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 938 · 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. 1.594 + 495 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
3. 3.297 + 792 =
4. 4.Take 441. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.Do the 1089 trick with 407: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 451. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 753. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 488: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.693 + 396 =
15. 15.495 + 594 =
16. 16.Take 913. 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 2. What is that number?
18. 18.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 238. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
22. 22.Do the 1089 trick with 135: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 532. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 744: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 684. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 985: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 442. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 543: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 725. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.198 + 891 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
36. 36.Do the 1089 trick with 198: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 482. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 537. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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