CFA Grade 3: OA.3.8

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What is multiplication?

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Multiplication is a mathematical operation where a number is added to itself a certain number of times. For example, 3 multiplied by 4 (3 x 4) means adding 3 four times: 3 + 3 + 3 + 3 = 12.

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What is addition?

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Addition is a mathematical operation where two or more numbers are combined to get a total. For example, 2 + 3 = 5.

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What is subtraction?

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Subtraction is a mathematical operation where one number is taken away from another. For example, 5 - 2 = 3.

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What is a word problem in math?

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A word problem is a mathematical question that is presented in the form of a story or real-life scenario, requiring interpretation and problem-solving.

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How do you find the total number of items when given groups?

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To find the total number of items in groups, multiply the number of groups by the number of items in each group. For example, if there are 4 groups of 5 apples, the total is 4 x 5 = 20 apples.

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What does 'how many more' mean in a math problem?

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'How many more' asks for the difference between a total amount and a given amount. For example, if you want to know how many more pages Mia needs to read to reach 40 pages after reading 27 pages, you subtract: 40 - 27 = 13.

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What is an equation?

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An equation is a mathematical statement that shows that two expressions are equal, often using an equals sign (=). For example, 2 + 3 = 5 is an equation.

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What does 'x' represent in an equation?

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In an equation, 'x' is often used as a variable that represents an unknown number that we need to find.

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To solve for 'x', subtract 7 from both sides of the equation: x = 15 - 7, so x = 8.

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What is the process of checking your answer in a math problem?

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To check your answer, substitute your solution back into the original problem to see if it makes the equation true.