This is a mathematical addition problem. Addition is one of the four basic operations. Refers to the calculation of combining two or more numbers and quantities into one number and quantity. The symbol of addition is the plus sign "+". Connect items with a plus sign when adding.

The specific problem solving process is as follows:

According to the stem, the first group picked 28, and the second group picked more than the first group 16.

Available addition formula: 28+ 16.

Calculated: 28+ 16=44 (pieces).

So the second group of students picked 44 watermelons.

Extended data

Addition has several important properties. It is interchangeable, which means that the order is not important, it is interrelated, which means that when more than two numbers are added, the order in which the addition is performed is not important. Repeatedly adding 1 is the same as counting; Adding 0 will not change the result. Addition also follows related operations such as subtraction and multiplication.

Addition, written with the plus sign "+"between terms; The result is represented by an equal sign. Like what?

Addition is one of the simplest digital tasks. The most basic addition: 1+ 1 five-month-old babies and even other animal species can be counted. In primary education, students are taught to calculate the superposition of decimal numbers, starting with one digit, and gradually solving the more difficult number calculation.

Reference source

Baidu Encyclopedia-Supplement