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
701–720 of 750 matching chapters · Page 36 of 38
Clear filtersGrade 8 · Chapter 701
Translate every coordinate equally · practice 81
Translate the point (1, 1) by the vector (3, 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 702
Follow decimal place-value scaling · practice 78
Write 3 × 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 703
Separate trend from causal claims · practice 80
For inputs [1, 2, 3, 4, 5] and corresponding outputs [7.75, 6.5, 11.5, 16.5, 15.25], 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 704
Accumulate circular cross-sections · practice 81
Find the volume of a cylinder with radius 4 and height 3. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 705
Bracket a principal square root · practice 83
Enclose √103 after 7 bisections starting from [0, 103]. 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 706
Distinguish length and area multipliers · practice 83
Dilate a rectangle with sides 1 and 3 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 707
Connect slope and a linear rule · practice 84
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 708
Locate simultaneous solutions · practice 84
Solve the simultaneous equations y = -0.5x and y = 2.5x + (4). 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 709
Follow decimal place-value scaling · practice 79
Write 3.5 × 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 710
Separate trend from causal claims · practice 81
For inputs [1, 2, 3, 4, 5] and corresponding outputs [8, 3, 8, 13, 8], 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 711
Accumulate circular cross-sections · practice 82
Find the volume of a cylinder with radius 2 and height 9. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 712
Bracket a principal square root · practice 84
Enclose √79 after 3 bisections starting from [0, 79]. 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 713
Distinguish length and area multipliers · practice 84
Dilate a rectangle with sides 2 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 714
Connect slope and a linear rule · practice 85
For the line y = -3.5x + (-9), 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 715
Locate simultaneous solutions · practice 85
Solve the simultaneous equations y = 3x and y = -1x + (-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 716
Follow decimal place-value scaling · practice 80
Write 4 × 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 717
Separate trend from causal claims · practice 82
For inputs [1, 2, 3, 4, 5] and corresponding outputs [8.25, -0.5, 4.5, 9.5, 0.75], 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 718
Accumulate circular cross-sections · practice 83
Find the volume of a cylinder with radius 7.5 and height 5. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 719
Bracket a principal square root · practice 85
Enclose √55 after 10 bisections starting from [0, 55]. 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 720
Distinguish length and area multipliers · practice 85
Dilate a rectangle with sides 5 and 5.75 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 chapter