Multiply by Pi - Approximation from Number (Level 3)

This topic focuses on practicing the skill of multiplying various numbers by the mathematical constant Pi (π) approximately using its common value of 3.14. The problems are designed to help students understand the concept of the circle circumference within geometry. Each problem asks students to calculate the product of a number and 3.14, and then choose the correct answer from multiple options. The exercise helps students approximate real multiplication scenarios using Pi, enhancing their ability to solve geometry problems related to circle circumferences.

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

Multiply by Pi - Approximation from Number Worksheet

Math worksheet on 'Multiply by Pi - Approximation from Number (Level 3)'. 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)

10 x 3.14

a

37.7

b

78.54

c

31.42

d

15.71

e

10

f

56.55

2

Approximate this number multiplied by Pi (π)

1 x 3.14

a

1.57

b

1

c

0.79

d

3.14

e

28.27

f

9.42

3

Approximate this number multiplied by Pi (π)

6 x 3.14

a

28.27

b

6

c

18.85

d

18

e

9.42

f

31.42

4

Approximate this number multiplied by Pi (π)

5 x 3.14

a

19.63

b

40.84

c

21.99

d

12.5

e

15.71

f

28.27

5

Approximate this number multiplied by Pi (π)

8 x 3.14

a

50.27

b

31.42

c

25.13

d

12.57

e

32

f

8

6

Approximate this number multiplied by Pi (π)

4 x 3.14

a

4

b

8

c

12.57

d

6.28

e

31.42

f

37.7

7

Approximate this number multiplied by Pi (π)

3 x 3.14

a

34.56

b

21.99

c

28.27

d

4.71

e

9.42

f

3