Math With Amar · Guided practice
10,000 ways to practice.
One idea at a time.
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.
Attempt · Explain · Animate
Grade 8 practice chapters
581–600 of 750 matching chapters · Page 30 of 38
Clear filtersGrade 8 · Chapter 581
Translate every coordinate equally · practice 66
Translate the point (1, 1) by the vector (-2, 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 582
Follow decimal place-value scaling · practice 63
Write 4 × 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 583
Separate trend from causal claims · practice 65
For inputs [1, 2, 3, 4, 5] and corresponding outputs [6.75, -2.5, 2, 6.5, -2.75], 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 584
Accumulate circular cross-sections · practice 66
Find the volume of a cylinder with radius 4 and height 10. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 585
Bracket a principal square root · practice 68
Enclose √106 after 4 bisections starting from [0, 106]. 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 586
Distinguish length and area multipliers · practice 68
Dilate a rectangle with sides 2 and 5.75 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 587
Connect slope and a linear rule · practice 69
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 588
Locate simultaneous solutions · practice 69
Solve the simultaneous equations y = 1.5x and y = -1.5x + (2). 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 589
Translate every coordinate equally · practice 67
Translate the point (1, 1) by the vector (-1, -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 590
Follow decimal place-value scaling · practice 64
Write 4.5 × 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 591
Separate trend from causal claims · practice 66
For inputs [1, 2, 3, 4, 5] and corresponding outputs [3.75, 0.5, -1.5, -3.5, -6.75], 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 592
Accumulate circular cross-sections · practice 67
Find the volume of a cylinder with radius 2 and height 6.5. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 593
Bracket a principal square root · practice 69
Enclose √82 after 11 bisections starting from [0, 82]. 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 594
Distinguish length and area multipliers · practice 69
Dilate a rectangle with sides 4 and 4.5 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 595
Connect slope and a linear rule · practice 70
For the line y = 2x + (6), 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 596
Locate simultaneous solutions · practice 70
Solve the simultaneous equations y = -1.5x and y = 2x + (-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 597
Translate every coordinate equally · practice 68
Translate the point (1, 1) by the vector (2, 6). 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 598
Follow decimal place-value scaling · practice 65
Write 5.5 × 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 599
Separate trend from causal claims · practice 67
For inputs [1, 2, 3, 4, 5] and corresponding outputs [9.5, 9, 13.5, 18, 17.5], 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 600
Accumulate circular cross-sections · practice 68
Find the volume of a cylinder with radius 7.5 and height 2.5. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapter