Reading a Scale

One centimetre on the map, half a kilometre on the ground.

10 problems · about 18 minutes · 7.G.A.1

NameDate

Figure — use these to answer the problems

One centimetre stands for a fixed distance. Scale it up to read any length.

Centimetres on the map1

Kilometres on the ground5

Scale it up by4

Figure 1

From earlier lessons. Loosen up before the new work.

3 problems

From “Scale Drawings and Area”
A shape is scaled by 3. How many times bigger is its area?
Answer
From “Scale Copies”
A 9 cm side becomes 27 cm. What is the scale factor?
Answer
3
From “Scale Drawings and Area”
Why does doubling the sides quadruple the area?
- Both the length and the width doubled.
- Because that is the rule.

Straightforward practice. Get the method working first.

3 problems

The same ideas with more to keep track of.

2 problems

Scale 1 cm to 250 m. Real distance for 4 cm, in metres?
Answer
Going from a real length to a map length, do you multiply or divide? Answer 1 for multiply, 2 for divide.
Answer

Mixed problems. Work out what kind of question it is before you start.

2 problems