The numbers of students in the four sixth frade classes at north scool are 26,19,34,21. Use properties to find the total number of students in the four classes
26 + 19 + 34 + 21 = total number of students commutative property...we are going to re-arrange the numbers (26 + 34) + (19 + 21) = total students 60 + 40 = total students 100 <===
