Arithmetic Problem Generator

Exercise Type

  • * Addition and carry exercises within 20 (first grade, first volume);
  • In addition, you can also generate targeted exercises including addition and carry exercises within 50, within 100, within 500, within 1000, and within 10000.

Key Points

  • 1. The concept of carry:
  • Carry is a form of operation. In the decimal system, carry one when the number is full of ten, that is: if the ones digit is full of ten, add one to the tens digit; if the tens digit is full of ten, add one to the hundreds digit;
  • 2. Carry practice:
  • For example, 27 + 15; align the same digits, start from the ones digit, and if the sum of the numbers in the digit is full of ten, carry one to the previous digit;
  • 1 ) Align the same digits; align the ones digit 7 with 5, and align the tens digit 2 with 1;
  • 2 ) Start from the ones digit; the ones digit 7 + 5 = 12 is full of ten, and carry one to the tens digit, that is: write 2 and carry 1; then calculate the tens digit (if there is a carry, add the carry ), tens digit 2 + 1 + 1 (carry) = 4; the result is 42;