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An Easy One… If we are given a problem such as… y + 8 = 11 we can easily figure out that the y must be equal to 3 because 3 + 8 = 11
But What If… we are given a problem such as… g + 216 = 543 What would you do?
Let’s go back to… Y + 8 = 11
Addition Problems subtract If we are looking at an addition problem then we need to subtract the same value from each side of the equation. For example… p + 54 = 124.
Subtraction Problems add If we are looking at a subtraction problem then we need to add the same value to each side of the equation. For example… w – 87 = 624
Let’s Try Some Examples! h – 6 = 12 Don’t forget to make sure your answer is valid!
Let’s Try Some Examples! j + 21 = 49 Don’t forget to make sure your answer is valid!
Let’s Try Some Examples! 32 + d = 56 Don’t forget to make sure your answer is valid!
Let’s Try Some Examples! b – 24 = 8 Don’t forget to make sure your answer is valid!
So Now What? We have now “undone” addition and subtraction problems by using the inverse (opposite) operation. But what would happen if we had… 5q = 35
Multiplication Problems divide If we are looking at a multiplication problem then we need to divide by the same value on each side of the equation.
Let’s go back to… 5q = 35
Let’s Try An Example! 8k = 96 Don’t forget to make sure your answer is valid!
Let’s Try Another Example! 25v = 300 Don’t forget to make sure your answer is valid!
Division Problems multiply If we are looking at a division problem then we need to multiply by the same value on each side of the equation. For example… d ÷ 6 = 6
Let’s Try An Example! Don’t forget to make sure your answer is valid!
Let’s Try Another Example! Don’t forget to make sure your answer is valid!
Let’s Try Another Example! 7c = 112 Don’t forget to make sure your answer is valid!
Let’s Try Another Example! Don’t forget to make sure your answer is valid! 52 + q = 98
Let’s Try Another Example! Don’t forget to make sure your answer is valid! u – 21.9 = 78.02
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