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
541–560 of 750 matching chapters · Page 28 of 38
Clear filtersGrade 8 · Chapter 541
Locate simultaneous solutions · practice 63
Solve the simultaneous equations y = -1x and y = -1.5x + (-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 542
Translate every coordinate equally · practice 61
Translate the point (1, 1) by the vector (1, -3). 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 543
Follow decimal place-value scaling · practice 59
Write 1.5 × 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 544
Separate trend from causal claims · practice 60
For inputs [1, 2, 3, 4, 5] and corresponding outputs [3.25, -3.5, 1, 5.5, -1.25], 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 545
Accumulate circular cross-sections · practice 61
Find the volume of a cylinder with radius 6.5 and height 9. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 546
Bracket a principal square root · practice 63
Enclose √107 after 3 bisections starting from [0, 107]. 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 547
Distinguish length and area multipliers · practice 63
Dilate a rectangle with sides 5 and 5 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 548
Connect slope and a linear rule · practice 64
For the line y = -1x + (-10), 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 549
Locate simultaneous solutions · practice 64
Solve the simultaneous equations y = 2.5x and y = 1.5x + (-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 550
Translate every coordinate equally · practice 62
Translate the point (1, 1) by the vector (5, 3). 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 551
Follow decimal place-value scaling · practice 60
Write 2 × 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 552
Separate trend from causal claims · practice 61
For inputs [1, 2, 3, 4, 5] and corresponding outputs [3.5, -7, -2.5, 2, -8.5], 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 553
Accumulate circular cross-sections · practice 62
Find the volume of a cylinder with radius 4.5 and height 5.5. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 554
Bracket a principal square root · practice 64
Enclose √83 after 10 bisections starting from [0, 83]. 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 555
Distinguish length and area multipliers · practice 64
Dilate a rectangle with sides 1.5 and 4 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 556
Connect slope and a linear rule · practice 65
For the line y = -1.5x + (3), 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 557
Locate simultaneous solutions · practice 65
Solve the simultaneous equations y = 0x and y = -1.5x + (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 558
Translate every coordinate equally · practice 63
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 559
Separate trend from causal claims · practice 62
For inputs [1, 2, 3, 4, 5] and corresponding outputs [0.5, -4, -6, -8, -12.5], 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 560
Accumulate circular cross-sections · practice 63
Find the volume of a cylinder with radius 2.5 and height 2. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapter