5. Approximation, Accuracy, Ratio & Proportion

5.1 Rounding Numbers
5.2 Decimal Places
5.3 Significant Figures
5.4 Estimating Calculations
5.5 Upper and Lower Bounds
5.6 Bounds in Calculations
5.7 Understanding Ratio
5.8 Simplifying Ratios
5.9 Sharing a Quantity in a Ratio
5.10 Ratio Word Problems
5.11 Proportional Reasoning
5.12 Map Scales and Ratios
5.13 Best Value Problems