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 7. What is that number?
- 2.198 + 891 =
- 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
- 4.594 + 495 =
- 5.Do the 1089 trick with 276: reverse and subtract, then reverse that answer and add. What do you get?
- 6.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 7.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
- 8.396 + 693 =
- 9.693 + 396 =
- 10.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
- 11.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
- 12.Take 238. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 13.495 + 594 =
- 14.Take 491. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 15.891 + 198 =
- 16.Take 346. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 17.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
- 18.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 19.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 20.Do the 1089 trick with 328: reverse and subtract, then reverse that answer and add. What do you get?
- 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
- 22.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 23.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 24.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
- 25.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 26.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
- 27.Do the 1089 trick with 285: reverse and subtract, then reverse that answer and add. What do you get?
- 28.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
- 29.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
- 31.Take 486. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 32.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
- 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
- 34.297 + 792 =
- 35.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 36.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 37.Do the 1089 trick with 167: reverse and subtract, then reverse that answer and add. What do you get?
- 38.Take 983. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 39.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
- 40.Do the 1089 trick with 430: reverse and subtract, then reverse that answer and add. What do you get?
Answer key
- 792
- 1089
- 198
- 1089
- 1089
- 594
- 1089
- 1089
- 1089
- 1089
- 1089
- 594
- 1089
- 297
- 1089
- 297
- 1089
- 792
- 792
- 1089
- 495
- 594
- 891
- 1089
- 792
- 1089
- 1089
- 1089
- 297
- 297
- 198
- 1089
- 396
- 1089
- 396
- 891
- 1089
- 594
- 1089
- 1089
Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks