Question

The number of students in the four sixth-grade classes are 26, 19, 34 and 21. Use properties to find the total number of students in the four classes.

26, 19, 34, and 21.

Answer 1

Just add it up.
26 + 19=45
45+34=79
79+21=100

Answer 2

You can use the associative property because the order does not matter with 2 or more numbers if you are just finding the sum. 26 + 19 + 34 + 21 = 100 students total