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Solve problems with rational numbers in decimal

BC Grade 9 Math: Master Essential Skills & Concepts

Rational Numbers

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Comparing and ordering rational numbers

Comparing decimal numbers

Comparing fractions

Solving problems with rational numbers in decimal form

Mixed Operations with Decimals

Mixed Operations

Mixed Operations with Decimals Bracket

Mixed Operations with Bracket Square

Solving problems with rational numbers in fraction form

Operations with fractions

Determine square roots of rational numbers

Square roots of rational numbers

Power and Exponents

Using exponents to describe numbers

Expanded powers

Exponent rules

Single Power Expressions

Dividing powers

Multiplying powers

Order of operations with exponents

Using exponents to solve problems

Scale Factors and Similarity

Enlargements and reductions with scale factors

Scale diagrams

Similar triangles

Similar polygons

Polynomials

Characteristics of polynomials

What are polynomials

Equivalent expressions of polynomials

Adding and subtracting polynomials

Multiplication and Division of Polynomials

Multiplying and dividing polynomials

Divide a monomial by a monomial

Multiply a monomial by a monomial

Multiplying polynomials by monomials

Multiply a polynomial by a monomial

Dividing polynomials by monomials

Linear Relations

Representing patterns in linear relations

Represent Patterns in Linear Relations Equation Decimal

Represent Patterns in Linear Relations Equation Integer Start From 0

Represent Patterns in Linear Relations Equation Integer Start From 1

Represent Patterns in Linear Relations Equation Negative Decimal

Identify the Linear Equation

Reading linear relation graphs

Solving linear equations by graphing

Solving Linear Equations

Solving linear equations using multiplicattion and division

Solving linear equations using multiplication and division

Two-step Linear Equations LHS

Two-step Linear Equations RHS

Solving two-step Linear equations: ax+b = c, x/a +b = c

Solving two-step linear equations: ax + b = c, x/a + b = c

Solving linear equations using distributive property a(x+b)=c

Solving linear equations using distributive property: a(x + b) = c

Solving linear equations with variables on both sides

Solving literal equations

Data Collection

Influencing factors in Data Collection

Influencing factors in data collection

Probability

BC Grade 9 Math

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- Hi. Welcome to this question right here. So we&apos;ve got a question here that says 
"Estimate and Calculate." The estimating part is actually pretty, you don't have to think too much. Basically that's negative, this is negative, right? So when they're both negative and you're trying to add them together, you know what? Just treat them as positive and at the very end, just put a negative sign right beside the answer. So we&apos;ve got a 2.4 and 6.5. You can say the answer is around 8.9ish something, but let's actually go ahead and calculate this without using a calculator. Let's have 2.43 to start off and let's just have the 6.53 right here. Let's put a plus sign in front of that because we are adding. You might be saying that it's negative, here and here. What's that supposed to mean? A negative 2.43 plus a negative 6.53. Think of the negative as 
"you owe me money." If you owe me two dollars and 43 cents, then you owe me another six dollars and 53 cents, how much do you own me at the very end? You just add up the money together, right? So let's go ahead and add the money together right here. It's three and three so we get a six here, four and five get a nine right there, and you get a six and two is eight. At the very end, you just put a negative sign, okay? 
So, when you have a negative, negative, when you're adding integers together or numbers together, if you get a negative minus a negative, just add them together and put a negative sign in front of that. Another way to think about it: you owe me two dollars and 42 cents and then you owe me another six dollars and 53 cents. It's like a subtraction in a way, like you've lost that money, so you put them together and this is your final answer for this project. Thanks for watching.

- Hi, welcome to this question right here. So we&apos;ve got 2.5 x -6.4. So if we do write it out in a regular way we would've written it like this, right? Okay, now that's my multiplication right here, let's actually just bring it over to the side a little bit more. So 2.5 x 6.4 so what's our final answer? Well, before we calculate the final answer, I want you to know that your final answer will have to be a negative, okay? Why? Because the first number is positive the second number is negative, right? If you're doing multiplication or division, okay? If one's positive one's negative, doesn't matter which one is which, the answer is definitely a negative, okay? Then, let's see to what happen to the rest. So 2.5 x 6.4 will work out to be at 16. So your final answer is just -16. Okay? Thanks for watching.

In this lesson, we will learn how to work with rational numbers in decimal form. We will look at questions on adding, subtracting, multiplying, and dividing rational numbers.

Adding and subtracting decimals

Multiplying decimals

Dividing decimals 

Order of operations (PEMDAS)