Part A:
Let x represent the total number of items in the bag.
Equation 1: 26 + (14 + 52) = x
This equation represents adding the number of pencils (26) to the sum of the number of red pens (14) and erasers (52) to get the total number of items in the bag.
Equation 2: (26 + 14) + 52 = x
This equation represents adding the sum of the number of pencils (26) and red pens (14) to the number of erasers (52) to get the total number of items in the bag.
Part B:
Equation 1: 26 + (14 + 52) = x
This equation is the same as in Part A, using the associative property of addition.
Equation 2: 52 + (26 + 14) = x
This equation represents adding the number of erasers (52) to the sum of the number of pencils (26) and red pens (14) to get the total number of items in the bag, using the commutative property of addition.