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
61–80 of 750 matching chapters · Page 4 of 38
Clear filtersGrade 8 · Chapter 61
Follow decimal place-value scaling · practice 6
Write 7.5 × 10^(6) 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 62
Separate trend from causal claims · practice 6
For inputs [1, 2, 3, 4, 5] and corresponding outputs [7, 2, 4.5, 7, 2], 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 63
Bracket a principal square root · practice 7
Enclose √23 after 8 bisections starting from [0, 23]. 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 64
Distinguish length and area multipliers · practice 7
Dilate a rectangle with sides 1 and 1.5 by length factor 1.75. 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 chapterGrade 8 · Chapter 65
Connect slope and a linear rule · practice 8
For the line y = -2.5x + (1), 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 66
Locate simultaneous solutions · practice 8
Solve the simultaneous equations y = 0.5x and y = -0.5x + (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 67
Translate every coordinate equally · practice 8
Translate the point (1, 1) by the vector (-6, -2). 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 68
Explain zero and negative powers · practice 6
Evaluate 4 raised to the integer power 3. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 69
Follow decimal place-value scaling · practice 7
Write 8 × 10^(1) 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 70
Separate trend from causal claims · practice 7
For inputs [1, 2, 3, 4, 5] and corresponding outputs [7.25, -1.5, 1, 3.5, -5.25], 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 71
Accumulate circular cross-sections · practice 7
Find the volume of a cylinder with radius 4 and height 9.5. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 72
Bracket a principal square root · practice 8
Enclose √118 after 3 bisections starting from [0, 118]. 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 73
Distinguish length and area multipliers · practice 8
Dilate a rectangle with sides 2 and 3.5 by length factor 1.25. 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 74
Connect slope and a linear rule · practice 9
For the line y = -4x + (-2), 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 75
Locate simultaneous solutions · practice 9
Solve the simultaneous equations y = -2.5x and y = 3x + (-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 76
Translate every coordinate equally · practice 9
Translate the point (1, 1) by the vector (-2, 4). 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 77
Recover a right-triangle distance · practice 7
A right triangle has perpendicular legs 3 and 9. Find its hypotenuse. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 78
Explain zero and negative powers · practice 7
Evaluate 3 raised to the integer power 2. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 79
Follow decimal place-value scaling · practice 8
Write 8.5 × 10^(-4) 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 80
Separate trend from causal claims · practice 8
For inputs [1, 2, 3, 4, 5] and corresponding outputs [13, 7, 16, 25, 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 chapter