Math With Amar · Guided 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
401–420 of 750 matching chapters · Page 21 of 38
Clear filtersGrade 8 · Chapter 401
Locate simultaneous solutions · practice 45
Solve the simultaneous equations y = 2.5x and y = -2.5x + (8). 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 402
Follow decimal place-value scaling · practice 42
Write 1 × 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 403
Accumulate circular cross-sections · practice 43
Find the volume of a cylinder with radius 5 and height 8. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 404
Bracket a principal square root · practice 45
Enclose √63 after 2 bisections starting from [0, 63]. 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 405
Distinguish length and area multipliers · practice 45
Dilate a rectangle with sides 2.5 and 5.25 by length factor 0.75. 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 406
Connect slope and a linear rule · practice 46
For the line y = -0.5x + (-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 407
Locate simultaneous solutions · practice 46
Solve the simultaneous equations y = -0.5x and y = 1x + (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 408
Translate every coordinate equally · practice 44
Translate the point (1, 1) by the vector (-6, 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 409
Follow decimal place-value scaling · practice 43
Write 1.5 × 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 410
Separate trend from causal claims · practice 44
For inputs [1, 2, 3, 4, 5] and corresponding outputs [1.75, -5.5, -1.5, 2.5, -4.75], 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 411
Accumulate circular cross-sections · practice 44
Find the volume of a cylinder with radius 3 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 412
Bracket a principal square root · practice 46
Enclose √39 after 9 bisections starting from [0, 39]. 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 413
Distinguish length and area multipliers · practice 46
Dilate a rectangle with sides 5.5 and 6 by length factor 2.25. 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 414
Connect slope and a linear rule · practice 47
For the line y = -2x + (-4), 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 415
Locate simultaneous solutions · practice 47
Solve the simultaneous equations y = 3x and y = -2.5x + (-5). 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 416
Translate every coordinate equally · practice 45
Translate the point (1, 1) by the vector (-5, -1). 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 417
Follow decimal place-value scaling · practice 44
Write 2 × 10^(2) 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 418
Separate trend from causal claims · practice 45
For inputs [1, 2, 3, 4, 5] and corresponding outputs [2, -9, -5, -1, -12], 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 419
Accumulate circular cross-sections · practice 45
Find the volume of a cylinder with radius 1 and height 1. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 420
Bracket a principal square root · practice 47
Enclose √15 after 5 bisections starting from [0, 15]. 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 chapter