1089 Trick Worksheet
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.
NameDateTime takenScore ___ / 40
- 1.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
- 2.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 3.Take 440. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 4.693 + 396 =
- 5.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 6.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 7.Do the 1089 trick with 220: reverse and subtract, then reverse that answer and add. What do you get?
- 8.792 + 297 =
- 9.Do the 1089 trick with 903: reverse and subtract, then reverse that answer and add. What do you get?
- 10.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
- 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
- 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
- 14.Do the 1089 trick with 752: reverse and subtract, then reverse that answer and add. What do you get?
- 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
- 16.Take 513. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
- 18.Take 711. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
- 20.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
- 21.Take 234. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 22.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 23.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 24.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
- 25.Take 215. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 26.198 + 891 =
- 27.495 + 594 =
- 28.Do the 1089 trick with 734: reverse and subtract, then reverse that answer and add. What do you get?
- 29.Do the 1089 trick with 724: reverse and subtract, then reverse that answer and add. What do you get?
- 30.Take 255. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 31.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
- 32.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 33.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
- 34.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
- 35.Do the 1089 trick with 816: reverse and subtract, then reverse that answer and add. What do you get?
- 36.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 37.594 + 495 =
- 38.396 + 693 =
- 39.Do the 1089 trick with 973: reverse and subtract, then reverse that answer and add. What do you get?
- 40.Take 826. Reverse its digits and take the smaller number away from the bigger one. What do you get?
Answer key
- 594
- 792
- 396
- 1089
- 891
- 495
- 1089
- 1089
- 1089
- 891
- 792
- 693
- 198
- 1089
- 891
- 198
- 297
- 594
- 396
- 1089
- 198
- 693
- 792
- 1089
- 297
- 1089
- 1089
- 1089
- 1089
- 297
- 1089
- 693
- 1089
- 1089
- 1089
- 792
- 1089
- 1089
- 1089
- 198
Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks