# TABE Math Computations Practice Test 1

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#### 2/9 + 3/9 = ?

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When adding fractions that have the same denominator (the number on the bottom), you simply add the numerators together and keep the denominator the same. So 2/9 + 3/9 = (2+3)/9 = 5/9

#### What is 20% of 100?

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20% is equivalent to 20/100 or 0.2. You find 20% of 100 by multiplying 100 x .2 = 20

#### 3^3 + 1^3 = ?

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The answer is (3 x 3 x 3) + (1 x 1 x 1) = 27 + 1 = 28

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#### 5/8 x 2/6 = ?

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When multiplying fractions, multiply both the numerators and denominators. So, 5/8 x 2/6 = (5x2)/(8x6) = 10/48 which is 5/24 when simplified.

#### 30 - (-4) = ?

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30 - (-4) is the same as 30 + 4 = 34

#### 8xy - 3xy = ?

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When adding or subtracting equations with variables, you keep the variable as a unit. Think of the variable xy as "apples", then the equation becomes 8 apples - 3 apples = 5 apples (or 5xy)

#### 13 ÷ 5 = ?

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5 goes into 13 2 times with a remainder of 3.

#### 9/11 - 5/11 = ?

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When subtracting fractions that have the same denominator (the number on the bottom), you simply subtract the numerators and keep the denominator the same. So 9/11 - 5/11 = (9-5)/11 = 4/11

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180÷20=9

#### N is the result of adding two numbers. What would be three times the other number if one of the numbers were 6?

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𝑥+𝑦=𝑁→𝑥=6→6+𝑦=𝑁→𝑦=𝑁–6→3𝑦=3(𝑁–6)

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𝐴. 7/9=0.77
𝐵. 2/3=0.66
𝐶. 3/4=0.75
𝐷. 2/5=0.4

#### If 3𝑥−5=8.5, What is the value of 5𝑥+3?

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3𝑥−5=8.5→3𝑥=8.5+5=13.5→𝑥=13.5/3=4.5
Then; 5𝑥+3=5(4.5)+3=22.5+3=25.5

#### What is the surface area of an isosceles right triangle with a 6 cm long leg?

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First, draw an isosceles triangle. Remember that the two sides of the triangle are equal.
Let put a for the legs. Then:
a = 6 ⇒ area of the triangle is:
1/2(6×6)=36/2=18 𝑐𝑚2