What You’ll Learn

Core math skills

• Add, subtract, multiply, and divide integers
• Apply the correct order of operations in multi-step problems
• Estimate and round values to support mental math
• Use reasonableness checks to identify and fix errors

Money contexts we’ll use

• Balances (positive and negative values)
• Deposits and withdrawals
• Refunds and corrections
• Number sense routines: “Does this total make sense?”

BC Math 8 Alignment

Big Ideas (Unit connections)

• Number concepts can be represented and applied in flexible ways to solve problems.
• Computational fluency supports problem solving and reasoning.
• Estimation and reasonableness checks help determine whether results make sense in context.

Curricular content in this unit

• Operations with integers (addition, subtraction, multiplication, division)
• Order of operations
• Estimation, rounding, and checking for reasonableness
• Applying number concepts in financial contexts

Curricular competencies emphasized

• Reasoning and analyzing
• Communicating mathematical thinking
• Connecting math to real-life situations
• Applying multiple strategies to solve problems

Lessons in This Unit

Performance Task

Bank Account Simulator + Receipt Error-Checking

You’ll track a “bank account” over time using transactions (deposits, withdrawals, refunds), then analyze receipts to find and fix calculation errors. Estimation and reasonableness checks are a key part of the task, along with clearly explaining your thinking.

Success in this unit looks like…

• I can model financial situations using positive and negative integers.
• I can accurately perform integer operations in multi-step problems.
• I can use estimation and rounding to check my work.
• I can explain why an answer makes sense (or doesn’t) in context.