M27
Decimals
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Sign inDEFINITION:
a fraction whose denominator is a power of ten and whose numerator is expressed by figures placed to the right of a decimal point.
HOW TO:
One Dollar and Twenty-Five Cents = $1.25
A 3.6 GPA
Everyday Use:
Decimals are used every day when dealing with numbers and money.
Lyrics
Today, you’re about to learn about decimals
Today, you’re about to learn about decimals
You’re working with a fraction and it’s written as a decimal
Today, you’re about to learn about decimals
Today, you’re about to learn about decimals
Today, you’re about to learn about decimals
You’re working with a fraction and it’s written as a decimal
Decimal’s another way of writing fractions
Without numerator, denominator action
It started out with just a decimal point
Could be numbers to the left or the right
Now I’m stressing the point
One to the left, you’ve got your whole number
One to the right, you’ve got your tenths place
For breaking down the whole numbers
So, let’s say, 7 tenths is the fraction
It’s written as decimal and this is how it happens
0.77 right of the decimal
So, we know it’s the tenths place this is the principle
Now this is a lesson you could learn in a day
To write a fraction as a decimal and this is the way
If it’s 5/10 now, just remember the principle
0.55 right of the decimal, never to the left
Left’s for whole numbers
I cannot stress less, the placement of those numbers
Today, you’re about to learn about decimals
Today, you’re about to learn about decimals
Today, you’re about to learn about decimals
You’re working with a fraction and it’s written as a decimal
Today, you’re about to learn about decimals
Today, you’re about to learn about decimals
Today, you’re about to learn about decimals
You’re working with a fraction and it’s written as a decimal
Standards
- CCSS.MATH.CONTENT.8.NS.A.1 — Know that numbers that are not rational are called irrational. Understand informally that every number has a decimal expansion; for rational numbers show that the decimal expansion repeats eventually, and convert a decimal expansion which repeats eventually into a rational number.
- CCSS.MATH.CONTENT.7.EE.B.3 — Solve multi-step real-life and mathematical problems posed with positive and negative rational numbers in any form (whole numbers, fractions, and decimals), using tools strategically. Apply properties of operations to calculate with numbers in any form; convert between forms as appropriate; and assess the reasonableness of answers using mental computation and estimation strategies.
- CCSS.MATH.CONTENT.8.EE.A.4 — Perform operations with numbers expressed in scientific notation, including problems where both decimal and scientific notation are used. Use scientific notation and choose units of appropriate size for measurements of very large or very small quantities (e.g., use millimeters per year for seafloor spreading). Interpret scientific notation that has been generated by technology.
- CCSS.MATH.CONTENT.7.NS.A.2.D — Convert a rational number to a decimal using long division; know that the decimal form of a rational number terminates in 0s or eventually repeats.