1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 931 · 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.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.Do the 1089 trick with 442: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.792 + 297 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
9. 9.891 + 198 =
10. 10.594 + 495 =
11. 11.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
13. 13.297 + 792 =
14. 14.495 + 594 =
15. 15.Take 408. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 377: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.198 + 891 =
21. 21.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
24. 24.Do the 1089 trick with 286: 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 5. What is that number?
26. 26.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 558. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 759: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 894. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 913: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 705: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 286. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
38. 38.396 + 693 =
39. 39.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?

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