Pre-Algebra Practice Test: answer key

Every answer, with a link to its step-by-step solution

#	Answer	Lesson	Solution
1	−3	Integers	Solved step by step
2	−65 m	Negative numbers in real life	Solved step by step
3	−7	Negative fractions and decimals	Solved step by step
4	9	Order of operations	Solved step by step
5	6(2 + 3)	Number properties for mental math	Solved step by step
6	GCF(18, 24) = 6	Factors and multiples	Solved step by step
7	1460 ÷ 10 has no remainder	Divisibility tests	Solved step by step
8	n(A ∪ B) = 7	Sets	Solved step by step
9	7	Venn diagrams with numbers	Solved step by step
10	6	Cartesian product A × B	Solved step by step
11	−12	Fractions	Solved step by step
12	0.46	Decimals	Solved step by step
13	710	Fractions and decimals	Solved step by step
14	x = 411	Repeating decimals to fractions	Solved step by step
15	500	Significant figures and estimating	Solved step by step
16	12	Bounds in calculations	Solved step by step
17	35%	Percent	Solved step by step
18	1.5	Percents, decimals and fractions	Solved step by step
19	A 28	Percent	Solved step by step
20	58 13%	Percent	Solved step by step
21	$64.80	Percents and money	Solved step by step
22	C 10%	Percent error	Solved step by step
23	$270	Percent change twice	Solved step by step
24	37.5 km per hour	Ratios, unit rates, compare deals	Solved step by step
25	A 6 and 24	Sharing in a ratio	Solved step by step
26	5.5 ft	Converting units	Solved step by step
27	y = 103x	Proportional relationships	Solved step by step
28	2 walls per hour	Unit rates with fractions	Solved step by step
29	density = 2.7 g/cm³	Density, pressure, population density	Solved step by step
30	€59.80	Exchange rates	Solved step by step
31	9	Powers, square roots, absolute value	Solved step by step
32	7.1	Estimating square roots	Solved step by step
33	A Rational	Rational or irrational	Solved step by step
34	x = 5	Solve x² = 49 and x³ = 27	Solved step by step
35	median = 9.5	Mean, median, mode, range	Solved step by step
36	mean ≈ 3.1	Frequency tables	Solved step by step
37	B No	Statistical questions and the shape of data	Solved step by step
38	2.4	Mean absolute deviation	Solved step by step
39	15%	Circle graphs	Solved step by step
40	B No	Samples and predictions	Solved step by step

Grade

Count your right answers and divide by the number of questions: A 90% or more, B 80%, C 70%, D 60%, F below 60%.