Chapter 1
Numbers and Operations
Course: Gace Middle Grades Math 4 8 704
Subject: Gace Middle Grades Math 4 8 704
Chapter: Numbers And Operations
1. Represents and solves word problems involving addition, subtraction, multiplication, and division of real numbers
Real numbers include integers, fractions, terminating and repeating decimals, and irrational values such as π and √2. Solving problems with these requires carefully selecting the correct operation to reflect the situation being modeled.
Addition is used for combining quantities. If a cyclist rides 12.4 miles in the morning and 15.6 miles in the afternoon, the total is 12.4 + 15.6 = 28 miles.
Subtraction represents taking away or finding differences. If a temperature was 78°F yesterday and dropped to 65°F today, the change is 78 – 65 = 13°F.
Multiplication is repeated addition or scaling. If a teacher orders 12 pencils in each pack and buys 8 packs, 12 × 8 = 96 pencils.