Quiz Preview! Lessons 5-1 To 5-3

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Scottwodahl
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1) What is the absolute value of -27?

Explanation

The absolute value of a number is its distance from zero on the number line. Since -27 is 27 units away from zero in the negative direction, the absolute value of -27 is 27.

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Quiz Preview! Lessons 5-1 To 5-3 - Quiz

This is a preview quiz over lessons 5-1 to 5-4. Take it and practice!

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2) -5.68 - 1.2 =

Explanation

Remember - Leave it, change it, change it. Leave the first number alone, change the subtraction to addition, and change the sign of the second number.

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3) What property says that a + b = b + a?

Explanation

The commutative property states that the order of addition does not affect the result. In other words, for any two numbers a and b, a + b is equal to b + a. This property holds true for addition in mathematics.

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4) 28 + (-34)

Explanation

The signs are different, so subtract and keep the sign of the number with the largest absolute value.

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5) A recipe calls for t cups of cheese, k cups of coffee, and m cups of green beans, for a total of g cups of ingredients.  Write an equation relating t, k, m and g.

Explanation

The equation t + k + m = g represents the relationship between the number of cups of cheese (t), cups of coffee (k), and cups of green beans (m) needed in a recipe, which together make up the total number of cups of ingredients (g).

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6) Rewrite the expression m - n, using the algebraic definition of subtraction.

Explanation

The correct answer is m + -n because the algebraic definition of subtraction states that subtracting a number is the same as adding its opposite. In this case, subtracting n is the same as adding -n. Therefore, rewriting m - n using the algebraic definition of subtraction gives us m + -n.

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7) If you have a clockwise 60 degree turn followed by a 240 degree counterclockwise turn, followed by a clockwise 20 degree turn, what is the result?

Explanation

The result of the given sequence of turns can be found by adding up the angles in a clockwise direction and subtracting the angles in a counterclockwise direction. In this case, we have a clockwise 60 degree turn followed by a 240 degree counterclockwise turn, which cancels out the initial clockwise turn. Finally, we have a clockwise 20 degree turn. Adding up all the clockwise turns, we get 60 + 20 = 80 degrees. Since there are no counterclockwise turns remaining, the final result is 80 degrees in a clockwise direction. Therefore, the correct answer is 160 degrees.

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What is the absolute value of -27?
-5.68 - 1.2 =
What property says that a + b = b + a?
28 + (-34)
A recipe calls for t cups of cheese, k cups of coffee, and m cups of...
Rewrite the expression m - n, using the algebraic definition of...
If you have a clockwise 60 degree turn followed by a 240 degree...
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