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
Choose a starting point
Practice at your level.
Grade labels are starting points; school sequences vary. Advanced chapters assume the prerequisites listed on their pages.
Attempt · Explain · Animate
Grade 8 practice chapters
661–680 of 750 matching chapters · Page 34 of 38
Clear filtersGrade 8 · Chapter 661
Translate every coordinate equally · practice 76
Translate the point (1, 1) by the vector (5, 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 662
Follow decimal place-value scaling · practice 73
Write 9.5 × 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 663
Separate trend from causal claims · practice 75
For inputs [1, 2, 3, 4, 5] and corresponding outputs [-1.25, -6.5, -8, -9.5, -14.75], 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 664
Accumulate circular cross-sections · practice 76
Find the volume of a cylinder with radius 6.5 and height 2. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 665
Bracket a principal square root · practice 78
Enclose √104 after 6 bisections starting from [0, 104]. 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 666
Distinguish length and area multipliers · practice 78
Dilate a rectangle with sides 2 and 3.5 by length factor 2.5. 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 667
Connect slope and a linear rule · practice 79
For the line y = 2.5x + (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 668
Locate simultaneous solutions · practice 79
Solve the simultaneous equations y = 0x and y = -1x + (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 669
Translate every coordinate equally · practice 77
Translate the point (1, 1) by the vector (6, 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 670
Follow decimal place-value scaling · practice 74
Write 1 × 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 671
Separate trend from causal claims · practice 76
For inputs [1, 2, 3, 4, 5] and corresponding outputs [4.5, 2, 7, 12, 9.5], 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 672
Accumulate circular cross-sections · practice 77
Find the volume of a cylinder with radius 4.5 and height 8. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 673
Bracket a principal square root · practice 79
Enclose √80 after 2 bisections starting from [0, 80]. 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 674
Distinguish length and area multipliers · practice 79
Dilate a rectangle with sides 3 and 5.5 by length factor 2. 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 675
Connect slope and a linear rule · practice 80
For the line y = 1x + (0), 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 676
Locate simultaneous solutions · practice 80
Solve the simultaneous equations y = -3x and y = 2.5x + (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 677
Translate every coordinate equally · practice 78
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 678
Follow decimal place-value scaling · practice 75
Write 1.5 × 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 679
Separate trend from causal claims · practice 77
For inputs [1, 2, 3, 4, 5] and corresponding outputs [4.75, -1.5, 3.5, 8.5, 2.25], 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 680
Accumulate circular cross-sections · practice 78
Find the volume of a cylinder with radius 2.5 and height 4.5. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapter