1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 176 · 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. 1.693 + 396 =
2. 2.Take 581. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 497. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
11. 11.297 + 792 =
12. 12.Take 588. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 360: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.792 + 297 =
16. 16.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 220: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 295: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 467: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
22. 22.594 + 495 =
23. 23.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.891 + 198 =
25. 25.396 + 693 =
26. 26.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
28. 28.Do the 1089 trick with 347: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.198 + 891 =
30. 30.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
32. 32.Do the 1089 trick with 306: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 930: 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 4. What is that number?
35. 35.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 268. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 145: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?

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