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.Take 693. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 2.792 + 297 =
- 3.495 + 594 =
- 4.Do the 1089 trick with 305: reverse and subtract, then reverse that answer and add. What do you get?
- 5.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 6.Do the 1089 trick with 622: reverse and subtract, then reverse that answer and add. What do you get?
- 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
- 8.Take 632. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 9.693 + 396 =
- 10.Take 773. 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 2. What is that number?
- 12.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
- 13.396 + 693 =
- 14.Do the 1089 trick with 920: 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 3. What is that number?
- 16.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
- 17.Take 311. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 18.Do the 1089 trick with 964: reverse and subtract, then reverse that answer and add. What do you get?
- 19.891 + 198 =
- 20.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
- 22.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
- 24.Do the 1089 trick with 611: reverse and subtract, then reverse that answer and add. What do you get?
- 25.Take 942. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 26.Take 755. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 27.Do the 1089 trick with 482: reverse and subtract, then reverse that answer and add. What do you get?
- 28.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 29.Do the 1089 trick with 193: reverse and subtract, then reverse that answer and add. What do you get?
- 30.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 31.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 32.Take 956. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 33.Do the 1089 trick with 996: reverse and subtract, then reverse that answer and add. What do you get?
- 34.Take 986. Reverse its digits and take the smaller number away from the bigger one. What do you get?
- 35.Do the 1089 trick with 398: reverse and subtract, then reverse that answer and add. What do you get?
- 36.198 + 891 =
- 37.Do the 1089 trick with 527: reverse and subtract, then reverse that answer and add. What do you get?
- 38.Do the 1089 trick with 771: reverse and subtract, then reverse that answer and add. What do you get?
- 39.Do the 1089 trick with 250: reverse and subtract, then reverse that answer and add. What do you get?
- 40.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
Answer key
- 297
- 1089
- 1089
- 1089
- 891
- 1089
- 198
- 396
- 1089
- 396
- 297
- 1089
- 1089
- 1089
- 396
- 1089
- 198
- 1089
- 1089
- 792
- 693
- 891
- 495
- 1089
- 693
- 198
- 1089
- 297
- 1089
- 792
- 693
- 297
- 1089
- 297
- 1089
- 1089
- 1089
- 1089
- 1089
- 1089
Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks