decimals – Math On The Fly

Tag: decimals

Pre-Algebra & Math Basics: Math Operations of Decimals

Posted on April 19, 2025April 19, 2025 by Nathaniel

In the video I cover adding decimals, subtracting decimals, multiplying decimals, and dividing decimals. When adding and subtracting decimals, the key is to keep the decimal places lined up. When multiplying decimals, you add up the total number of decimal places to get the answer. For dividing decimals, I quickly cover the situations of dividing decimals by whole numbers and dividing decimals by decimals.

The following problems are covered in the video:

Adding Decimals
→ 15 + 0.4 + .9251
→ 13.829 + 6 + .7

Subtracting Decimals
→ 17.912 – 4.5
→ 5.6 – 0.3991
→ 100 – 0.72

Multiplying Decimals
→ 1.2 × 11
→ 1.2 × 1.1
→ 12 × 1.1
→ .12 × 1.1
→ .12 × .11

Dividing Decimals
→ 2.67 ÷ 3
→ 2.67 ÷ 0.3
→ 2.67 ÷ 0.003

Below is the video. Enjoy!

Pre-Algebra & Math Basics: Dividing Decimals

Posted on April 19, 2025April 19, 2025 by Nathaniel

In this video, I go into detail the correct way to divide decimals. I go through the difference between terminating and repeating decimals. I also handle the situations of dividing decimals by whole numbers, dividing decimals by decimals, and when to stop the division in both situations.

The following problems are covered in the video:

Dividing Decimals by Whole Numbers:
→ 38.72 ÷ 4
→ 5.0 ÷ 8
→ 1.48 ÷ 20
→ 2.6 ÷ 3
→ 14.0 ÷ 11

Dividing Decimals by Decimals:
→ 41.35 ÷ 0.5
→ 4.32 ÷ 0.009
→ 0.158 ÷ 0.06

Below is the video. Enjoy!

Pre-Algebra & Math Basics: Rounding Decimals

Posted on March 23, 2025 by Nathaniel

In this video, I cover the topic of rounding decimals, a topic that confuses many students. I cover the 3 steps of rounding decimals and use those steps to round decimals to the nearest tenth, hundredth, thousandth and ten thousandth. I also cover the special situations of rounding up on 9, rounding to the nearest dollar and whole number, as well as rounding repeating decimals.

The following problems are covered in the video:

→ Round 8.2748 and 0.9468 to the nearest tenth
→ Round 0.1652 and 6.083 to the nearest tenth
→ Round 1.3975 to the nearest hundredth (Round up on 9)
→ Round 7.615 and 0.8016 to the nearest thousandth
→ Round 9.1738 to one, two, three and four decimal places
→ Round 3.499 and 49.82 to the nearest whole number
→ Round $7.61 to the nearest dollar
→ Round $24.19 to the nearest dollar

The following examples of repeating decimals are also covered:

Below is the video. Enjoy!