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
381–400 of 750 matching chapters · Page 20 of 38
Clear filtersGrade 8 · Chapter 381
Accumulate circular cross-sections · practice 40
Find the volume of a cylinder with radius 3.5 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 382
Bracket a principal square root · practice 42
Enclose √16 after 4 bisections starting from [0, 16]. 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 383
Distinguish length and area multipliers · practice 42
Dilate a rectangle with sides 2 and 3.5 by length factor 0.5. 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 384
Connect slope and a linear rule · practice 43
For the line y = 3x + (-8), 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 385
Locate simultaneous solutions · practice 43
Solve the simultaneous equations y = 1.5x and y = -2.5x + (0). 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 386
Translate every coordinate equally · practice 42
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 387
Follow decimal place-value scaling · practice 40
Write 9 × 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 388
Separate trend from causal claims · practice 42
For inputs [1, 2, 3, 4, 5] and corresponding outputs [-4.5, -7, -9.5, -12, -14.5], 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 389
Accumulate circular cross-sections · practice 41
Find the volume of a cylinder with radius 1.5 and height 6. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 390
Bracket a principal square root · practice 43
Enclose √111 after 10 bisections starting from [0, 111]. 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 391
Distinguish length and area multipliers · practice 43
Dilate a rectangle with sides 3 and 5.5 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 chapterGrade 8 · Chapter 392
Connect slope and a linear rule · practice 44
For the line y = 2.5x + (5), 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 393
Locate simultaneous solutions · practice 44
Solve the simultaneous equations y = -1.5x and y = 1x + (-7). 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 394
Translate every coordinate equally · practice 43
Translate the point (1, 1) by the vector (2, 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 395
Follow decimal place-value scaling · practice 41
Write 9.5 × 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 396
Separate trend from causal claims · practice 43
For inputs [1, 2, 3, 4, 5] and corresponding outputs [1.25, 1.5, 5.5, 9.5, 9.75], 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 397
Accumulate circular cross-sections · practice 42
Find the volume of a cylinder with radius 7 and height 2. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 398
Bracket a principal square root · practice 44
Enclose √87 after 6 bisections starting from [0, 87]. 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 399
Distinguish length and area multipliers · practice 44
Dilate a rectangle with sides 1.5 and 3.25 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 400
Connect slope and a linear rule · practice 45
For the line y = 1x + (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 chapter