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
281–300 of 750 matching chapters · Page 15 of 38
Clear filtersGrade 8 · Chapter 281
Translate every coordinate equally · practice 31
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 282
Recover a right-triangle distance · practice 27
A right triangle has perpendicular legs 9 and 11. Find its hypotenuse. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 283
Follow decimal place-value scaling · practice 29
Write 2.5 × 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 284
Separate trend from causal claims · practice 30
For inputs [1, 2, 3, 4, 5] and corresponding outputs [3, 4, 7.5, 11, 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 285
Accumulate circular cross-sections · practice 30
Find the volume of a cylinder with radius 3 and height 2. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 286
Bracket a principal square root · practice 31
Enclose √42 after 6 bisections starting from [0, 42]. 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 287
Distinguish length and area multipliers · practice 31
Dilate a rectangle with sides 4.5 and 4.75 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 chapterGrade 8 · Chapter 288
Connect slope and a linear rule · practice 32
For the line y = -1.5x + (5), 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 289
Locate simultaneous solutions · practice 32
Solve the simultaneous equations y = -0.5x and y = 0.5x + (0). 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 290
Translate every coordinate equally · practice 32
Translate the point (1, 1) by the vector (3, -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 291
Recover a right-triangle distance · practice 28
A right triangle has perpendicular legs 5 and 5. Find its hypotenuse. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 292
Follow decimal place-value scaling · practice 30
Write 3 × 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 293
Separate trend from causal claims · practice 31
For inputs [1, 2, 3, 4, 5] and corresponding outputs [3.25, 0.5, 4, 7.5, 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 294
Accumulate circular cross-sections · practice 31
Find the volume of a cylinder with radius 1 and height 8. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 295
Bracket a principal square root · practice 32
Enclose √18 after 2 bisections starting from [0, 18]. 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 296
Distinguish length and area multipliers · practice 32
Dilate a rectangle with sides 1 and 3.75 by length factor 1.5. 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 297
Connect slope and a linear rule · practice 33
For the line y = -3x + (2), 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 298
Locate simultaneous solutions · practice 33
Solve the simultaneous equations y = 3x and y = -3x + (-6). 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 299
Translate every coordinate equally · practice 33
Translate the point (1, 1) by the vector (6, 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 300
Recover a right-triangle distance · practice 29
A right triangle has perpendicular legs 3 and 8. Find its hypotenuse. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapter