Full-Length 6th Grade STAAR Math Practice Test-Answers and Explanations
Did you take the 6th Grade STAAR Math Practice Test? If so, then it’s time to review your results to see where you went wrong and what areas you need to improve.
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Probability \(=\frac{number \space of \space desired \space outcomes}{number \space of \space total \space outcomes} = \frac{9}{9+15+14+16}=\frac{9}{54}=\frac{1}{6}=0.16\)
6- Choice D is correct
Let’s compare each fraction: \(\frac{2}{3}<\frac{3}{4}<\frac{7}{9}<\frac{4}{5}\)
Only choice D provides the right order.
7- Choice B is correct
Let \(y\) be the width of the rectangle. Then; \(14×y=84→y=\frac{84}{14}=6\)
8- Choice B is correct
\(4×\frac{5}{16}=\frac{20}{16}=1.25\)
A. \(1.25>2\)
B. \(1<1.25<2\) This is the answer!
C. \(\frac{3}{8}=1.25\)
D. \(1.25=2^2\)
9- Choice B is correct
In any rectangle, The measure of the sum of all the angles equals \(180^\circ\).
10- Choice C is correct
\(\frac{824}{17}=48.5\)
11- The answer is \(7^2\).
\(588=2^2×3^1×7^2\)
12- Choice B is correct
The area of the trapezoid is:????\(=\frac{(???? \space 1+???? \space 2)}{2}
×ℎ???ℎ?=\frac{12+10}{2}?=?→11?=?→?=\frac{A}{11}\)
13- Choice B is correct
\(\frac{72}{8}=9, \frac{648}{72}=9, \frac{5832}{648}=9\), Therefore, the factor is \(9\).
14- Choice C is correct
Simplify each option provided.
A. \(13-(3×6)+(7×(-6))=13-18+(-42)=-5-42=-47\)
B. \((\frac{25}{400})+(\frac{7}{50})=\frac{25}{400}+\frac{56}{400}=\frac{81}{400}\)
C. \(((22×\frac{30}{6})-(7×\frac{144}{12}))×\frac{18}{2}=(110-84)×9=26×9=234\) (this is the answer)
D. \((\frac{6}{24}+\frac{12}{33})-50=(\frac{1}{4}+\frac{1}{3})-50=(\frac{3}{12}+\frac{4}{12})-50=\frac{7}{12}-50=\frac{-593}{15}\)
15- Choice D is correct
To find the discount, multiply the number \((100\%- rate \space of \space discount)\)
Therefore; \(450(100\%-16\%)=450(1-0.16)=450-(450×0.16)\)
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16- Choice A is correct
1,400 out of 11,900 equals to \(\frac{1,400}{11,900}=\frac{200}{1,700}=\frac{2}{17}\)
17- Choice C is correct
The opposite of Nicolas’s integer is \(25\). So, the integer is \(-25\). The absolute value of \(25\) is also \(25\).
18- Choice B is correct
Volume of a box = length\( ×\) width \(×\) height \(= 7 × 4 × 12 = 336\)
19- Choice C is correct
1 yard = 3 feet, Therefore: \(33,759 \space ft×\frac{1 \space yd}{3 \space ft}=11,253 \space yd\)
20- Choice B is correct
\(16\%\) of the volume of the solution is alcohol. Let \(x\) be the volume of the solution.
Then: \(16\%\) of \(x=38\) ml ⇒ \(0.16x=38 ⇒ x=38÷0.16=237.5\)
21- Choice C is correct
\((-2)(9x-8)=(-2)(9x)+(-2)(-8)=-18x+16\)
22- Choice D is correct
1 pt = 16 fluid ounces. \(576 ÷ 16 = 36 \)
Then: 576 fluid ounces = 36 pt
23- Choice D is correct
1 kg = 1000 g and 1 g = 1000 mg,
120 kg = 120 × 1000 g = 120 × 1000 × 1000 = 120,000,000 mg
24- Choice C is correct
The diameter of a circle is twice the radius. Radius of the circle is \(\frac{14}{2}=7\).
Area of a circle \(= πr^2=π(7)^2=49π=49×3.14=153.86≅153.9\)
25- Choice B is correct
Average (mean)\(=\frac{sum \space of \space terms}{number \space of \space terms}=\frac{15+17+12+16+21+23}{6}=\frac{104}{6}=17.33\)
26- Choice C is correct
Prime factorizing of \(18=2×3×3\), Prime factorizing of \(24=2×2×2×3\)
LCM \(= 2×2×2×3×3=72\)
27- Choice B is correct
The coordinate plane has two axes. The vertical line is called the \(y\)-axis and the horizontal is called the \(x\)-axis. The points on the coordinate plane are addressed using the form \((x,y)\). Point A is one unit on the left side of \(x\)-axis, therefore its \(x\) value is 4 and it is two units up, therefore its \(y\)-axis is 2. The coordinate of the point is: (4, 2)
28- Choice B is correct
\(α\) and \(β\) are supplementary angles. The sum of supplementary angles is 180 degrees.
\(α+β=180^\circ→α=180^\circ -β=180^\circ-125^\circ=55^\circ, Then, \frac{α}{β}=\frac{55}{125}=\frac{11}{25}\)
29- Choice C is correct
The opposite number of any number \(x\) is a number that if added to \(x\), the result is 0. Then:
\(7+(-7)=0 and 4+(-4)=0\)
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30- Choice C is correct
\(16=-129+x\), First, subtract 129 from both sides of the equation. Then:
\(16+129=-129+x+129 →145=x\)
31- Choice D is correct
\(-5<2x+7≤3\)→ (add (\(-7\)) all sides) \((-7)+(-5)<2x+7+(-7)≤3+(-7) →-12<2x≤-4→\) (divide all sides by 2), \(-6<x≤-2\)
In inequality \(-6<x≤-2\), \(x\) is fewer or equal to \(-2\) and more than \(-6\). Only choice D represents the same inequality on the number line. For education statistics and research, visit the National Center for Education Statistics.
32- Choice B is correct
A. Number of books sold in April is: \(690\)
The number of books sold in July is: \(1150→ \frac{690}{1150}≠2\)
B. Number of books sold in July is: \(1150\)
Half the number of books sold in May is: \(\frac{1150}{2} =575→690>575\) (it’s correct)
C. Number of books sold in June is: \(375\)
Half the number of books sold in April is: \(\frac{690}{3}=230→240<375\)
D. \(690+375=1,065>1150\) For education statistics and research, visit the National Center for Education Statistics.
33- Choice B is correct
\(51∶18=17∶6, 17×3=51\) and \(8×3=18\) For education statistics and research, visit the National Center for Education Statistics.
34- Choice A is correct
There are 6 integers from 9 to 15. Set of numbers that are not composite between 9 and 15 is: { 11,13}, 2 integers are not composite. Probability of not selecting a composite number is: Probability\(= \frac{number \space of \space desired \space outcomes}{number \space of \space total \space outcomes}= \frac{2}{6}=\frac{1}{3}\) For education statistics and research, visit the National Center for Education Statistics.
35- Choice A is correct
Number of biology book: 20, Total number of books; \(20+59+36=115\)
The ratio of the number of biology books to the total number of books is: \(\frac{20}{115}=\frac{4}{23}\) For education statistics and research, visit the National Center for Education Statistics.
36- Choice B is correct
A. \(\frac{5}{8}<0.8→ \frac{5}{8}=0.6\). Therefore, this inequality is not correct.
B. \(23\%<\frac{2}{3} →23\%= 0.23, \frac{2}{3}=0.66\),Therefore \(0.23<0.66\).
C. \(8<\frac{18}{3} →\frac{18}{3}=6\). Therefore, this inequality is not correct.
D. \(0.6>\frac{7}{9}→ \frac{7}{9}=0.77→0.77>0.6\), this inequality is not correct. For education statistics and research, visit the National Center for Education Statistics.
37- Choice A is correct
\(38÷2=19\) For education statistics and research, visit the National Center for Education Statistics.
38- The answer is 0.38
38 percent = 0.38 For education statistics and research, visit the National Center for Education Statistics.
39- Choice B is correct
Let’s write the inequality for each statement.
A. \(\frac{x}{19}<9\)
B. \(\frac{9}{x}≤19\) This is the inequality provided in the question.
C. \(\frac{x}{9}≤19\)
D. \(\frac{x}{9}<19\) For education statistics and research, visit the National Center for Education Statistics.
40- Choice C is correct
Since E is the midpoint of AB, then the area of all triangles DAE, DEF, CFE, and CBE are equal. The total area of ABCD is 180. So, the area of each triangle is 180 ÷ 4 = 45
The area of the triangle ADE is: 45 For education statistics and research, visit the National Center for Education Statistics.
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