Multiply by Pi - Approximation (Level 2)

This math topic focuses on approximating products involving the mathematical constant Pi (π), using π = 3.14 for calculations. It's part of an introductory unit on the circumference of circles within geometry. Students practice multiplying various integers by Pi to find approximate values, and must choose the correct result from a list of options. These problems help develop skills in applying a constant to different numbers and enhance understanding of circle-related calculations in geometry.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

Multiply by Pi - Approximation Worksheet

Math worksheet on 'Multiply by Pi - Approximation (Level 2)'. Part of a broader unit on 'Geometry - Circle Circumference - Intro' Learn online: app.mobius.academy/math/units/geometry_circles_perimeter_intro/

1

Approximate this number multiplied by Pi (π)

3 x π (π = 3.14)

a

3

b

7.07

c

4.71

d

28.27

e

9.42

f

21.99

2

Approximate this number multiplied by Pi (π)

8 x π (π = 3.14)

a

12.57

b

43.98

c

32

d

25.13

e

50.27

f

31.42

3

Approximate this number multiplied by Pi (π)

4 x π (π = 3.14)

a

37.7

b

6.28

c

12.57

d

18.85

e

8

f

31.42

4

Approximate this number multiplied by Pi (π)

9 x π (π = 3.14)

a

40.5

b

40.84

c

63.62

d

53.41

e

9

f

28.27

5

Approximate this number multiplied by Pi (π)

2 x π (π = 3.14)

a

2

b

18.85

c

25.13

d

6.28

e

3.14

6

Approximate this number multiplied by Pi (π)

10 x π (π = 3.14)

a

10

b

43.98

c

37.7

d

31.42

e

78.54

f

15.71

7

Approximate this number multiplied by Pi (π)

6 x π (π = 3.14)

a

9.42

b

18

c

18.85

d

28.27

e

25.13

f

6