In this Grade 7 Pengi Math lesson from Chapter 1: The Integer System and Operations, students apply integers to real-world contexts such as temperature changes, elevation, and financial transactions. They calculate net change, final values, and mean rate of change using all four integer operations. Multi-step word problems challenge students to connect integer arithmetic to everyday situations.
Section 1
Calculating a Final Value After a Change
We denote gains by positive numbers and losses by negative numbers.
We can find the net change in a quantity by adding those gains and losses.
Section 2
Solving word problems with integer subtraction
To solve word problems involving integer subtraction:
Expand to review the lesson summary and core properties.
Section 1
Calculating a Final Value After a Change
We denote gains by positive numbers and losses by negative numbers.
We can find the net change in a quantity by adding those gains and losses.
Section 2
Solving word problems with integer subtraction
To solve word problems involving integer subtraction: