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•••

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𝑎 ∶ 𝑏 𝑎 𝑏

1 ∶ 𝑛 𝑛1 ∶ 𝑛

3

4

3

7

1 m2 ≠ 100 cm2

≡≡

≡

𝑥𝑥

°

18 cm

18 cm 18 cm 18 cm 18 cm 18 cm

4 km 4 km 4 km

3 3

=

kg/m3 m3

cm3

cm3

cm3

cm3

cm3

400 400 400 400 400

2 𝑙

180 g

× 2

× 2

÷ 2

+

+

=

=

£1 = €1.14

€1 = £0.86£1 = €1.14

× 2

× 10

÷ 10

+

+

=

=

€£1 = €1.14

£171

£1 = $1.24

5 = 8 10 = 13

1 = 1002 = 101

≈

× 1.6

÷ 1.6

× 4 ÷ 4×

5

8

𝑦 = 𝑥2 𝑥 ≥ 0

𝑎

𝑏

Number of hours

Co

st (

£)

× 2 × 2