This math topic focuses on practicing the approximation of multiplying various numbers by Pi (π), an essential skill for understanding circle circumferences in geometry. It involves calculating and identifying the correct approximation of results such as 8 x π, 6 x π, and so forth, with multiple-choice answers provided for each question. This activity is suitable for enhancing mathematical skills related to geometry, specifically concerning the properties and measurements of circles.
Work on practice problems directly here, or download the printable pdf worksheet to practice offline.
Practice:
Multiply by Pi - Approximation
Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.
Approximate this number multiplied by Pi (π)
4 x π
Multiply by Pi - Approximation Worksheet
| Math worksheet on 'Multiply by Pi - Approximation (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 π |
a
| 37.7 |
b
| 50 |
c
| 10 |
d
| 31.42 |
e
| 15.71 |
f
| 43.98 |
2
| Approximate this number multiplied by Pi (π) |
| 3 x π |
a
| 34.56 |
b
| 7.07 |
c
| 4.5 |
d
| 15.71 |
e
| 9.42 |
f
| 4.71 |
3
| Approximate this number multiplied by Pi (π) |
| 7 x π |
a
| 11 |
b
| 7 |
c
| 34.56 |
d
| 28.27 |
e
| 40.84 |
f
| 21.99 |
4
| Approximate this number multiplied by Pi (π) |
| 2 x π |
a
| 2 |
b
| 12.57 |
c
| 3.14 |
d
| 18.85 |
e
| 6.28 |
f
| 31.42 |
5
| Approximate this number multiplied by Pi (π) |
| 9 x π |
a
| 28.27 |
b
| 63.62 |
c
| 9 |
d
| 14.14 |
e
| 40.5 |
f
| 34.56 |
6
| Approximate this number multiplied by Pi (π) |
| 4 x π |
a
| 8 |
b
| 25.13 |
c
| 4 |
d
| 18.85 |
e
| 6.28 |
f
| 12.57 |
7
| Approximate this number multiplied by Pi (π) |
| 6 x π |
a
| 18 |
b
| 9.42 |
c
| 18.85 |
d
| 28.27 |
e
| 6 |
f
| 25.13 |