Math With Amar · Guided practice
10,000 ways to practice.
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Each chapter gives you a distinct mathematical scenario: one question to attempt, a hint, a worked solution, and an animated example you can control.
10,000 questions · 10,000 animated scenarios · 14 study levels
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Grade labels are starting points; school sequences vary. Advanced chapters assume the prerequisites listed on their pages.
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Grade 8 practice chapters
101–120 of 750 matching chapters · Page 6 of 38
Clear filtersGrade 8 · Chapter 101
Distinguish length and area multipliers · practice 11
Dilate a rectangle with sides 2.5 and 5.25 by length factor 1.5. Find the new side lengths and area. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 102
Connect slope and a linear rule · practice 12
For the line y = 2.5x + (7), find y when x = 3 and identify the slope and vertical intercept. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 103
Locate simultaneous solutions · practice 12
Solve the simultaneous equations y = 2x and y = -0.5x + (1). Classify the number of solutions. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 104
Translate every coordinate equally · practice 12
Translate the point (1, 1) by the vector (3, 5). Find the image and the movement length. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 105
Recover a right-triangle distance · practice 9
A right triangle has perpendicular legs 5 and 11. Find its hypotenuse. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 106
Explain zero and negative powers · practice 9
Evaluate 4 raised to the integer power 5. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 107
Follow decimal place-value scaling · practice 11
Write 1 × 10^(-5) as an ordinary decimal number. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 108
Separate trend from causal claims · practice 11
For inputs [1, 2, 3, 4, 5] and corresponding outputs [-1.25, -9.5, -6.5, -3.5, -11.75], find the least-squares slope, mean output, and sum of squared residuals. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 109
Accumulate circular cross-sections · practice 11
Find the volume of a cylinder with radius 3.5 and height 4.5. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 110
Bracket a principal square root · practice 12
Enclose √22 after 9 bisections starting from [0, 22]. Report bounds rounded outward to five decimal places and the exact interval width. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 111
Distinguish length and area multipliers · practice 12
Dilate a rectangle with sides 5.5 and 6 by length factor 3. Find the new side lengths and area. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 112
Connect slope and a linear rule · practice 13
For the line y = 1.5x + (-9), find y when x = 3 and identify the slope and vertical intercept. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 113
Locate simultaneous solutions · practice 13
Solve the simultaneous equations y = -1x and y = 3x + (-6). Classify the number of solutions. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 114
Translate every coordinate equally · practice 13
Translate the point (1, 1) by the vector (4, 0). Find the image and the movement length. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 115
Recover a right-triangle distance · practice 10
A right triangle has perpendicular legs 1 and 5. Find its hypotenuse. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 116
Follow decimal place-value scaling · practice 12
Write 1.5 × 10^(3) as an ordinary decimal number. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 117
Separate trend from causal claims · practice 12
For inputs [1, 2, 3, 4, 5] and corresponding outputs [-1, -13, -10, -7, -19], find the least-squares slope, mean output, and sum of squared residuals. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 118
Accumulate circular cross-sections · practice 12
Find the volume of a cylinder with radius 1.5 and height 1. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 119
Bracket a principal square root · practice 13
Enclose √117 after 4 bisections starting from [0, 117]. Report bounds rounded outward to five decimal places and the exact interval width. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 120
Distinguish length and area multipliers · practice 13
Dilate a rectangle with sides 1 and 3 by length factor 2.75. Find the new side lengths and area. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapter