Mathematics
Grade 7
15 min
Maps with fractional distances
Maps with fractional distances
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1
Introduction & Learning Objectives
Learning Objectives
Identify and interpret map scales involving fractions and mixed numbers.
Convert mixed numbers to improper fractions and vice versa to facilitate calculations.
Multiply fractions and mixed numbers to calculate actual distances from map distances and scales.
Divide fractions and mixed numbers to determine map distances or scale factors.
Solve real-world problems involving fractional distances on maps, showing all steps.
Compare and order fractional distances to determine the shortest or longest routes.
Ever wondered how to figure out the real distance between two places just by looking at a map? 🗺️ It's like having a secret code to unlock adventures!
In this lesson, you'll learn how to use fractions to understand map scales and calculate actual...
2
Key Concepts & Vocabulary
TermDefinitionExample
Map ScaleThe ratio that compares a distance on a map to the actual distance it represents on the ground. It's often expressed as a fraction or a ratio (e.g., 1 inch = 10 miles).A map scale of 1 inch = $5rac{1}{2}$ miles means every 1 inch on the map represents $5rac{1}{2}$ miles in reality.
Map DistanceThe measured length between two points on a map.If you measure $2rac{1}{4}$ inches between your house and the park on a map, that is the map distance.
Actual DistanceThe true, real-world distance between two points.If the map distance to the park is $2rac{1}{4}$ inches and the scale is 1 inch = 2 miles, the actual distance is $4rac{1}{2}$ miles.
FractionA number representing a part of a whole, written as a numerator over a denominator (e.g., $rac{1}{2}$, $r...
3
Core Formulas
Converting Mixed Numbers to Improper Fractions
$A rac{b}{c} = rac{(A \times c) + b}{c}$
Before multiplying or dividing mixed numbers, convert them into improper fractions. Multiply the whole number by the denominator, add the numerator, and place the result over the original denominator.
Multiplying Fractions
$\frac{a}{b} \times \frac{c}{d} = \frac{a \times c}{b \times d}$
To find the actual distance, multiply the map distance (as a fraction) by the actual distance represented by one unit on the map (from the scale). Multiply the numerators together and the denominators together. Simplify the resulting fraction if possible.
Dividing Fractions (Keep, Change, Flip)
$\frac{a}{b} \div \frac{c}{d} = \frac{a}{b} \times \frac{d}{c}$
To find a map distance when given an ac...
4 more steps in this tutorial
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Easy
According to the tutorial, what is the definition of a 'Map Scale'?
A.The measured length between two points on a map.
B.The true distance between two locations on the ground.
C.The ratio that compares a distance on a map to the actual distance on the ground.
D.The formula used to convert improper fractions to mixed numbers.
Easy
Following the formula from the tutorial, how do you convert the mixed number 5 3/4 into an improper fraction?
A.15/4
B.23/4
C.12/5
D.20/3
Easy
Based on the tutorial's step-by-step guide for calculating actual distance, what is the essential first step when the map distance and scale are given as mixed numbers?
A.Multiply the whole numbers together.
B.Simplify the fractional parts.
C.Convert both mixed numbers to improper fractions.
D.Divide the map distance by the scale.
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