Math With Amar · Guided 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
341–360 of 750 matching chapters · Page 18 of 38
Clear filtersGrade 8 · Chapter 341
Locate simultaneous solutions · practice 38
Solve the simultaneous equations y = -1x and y = -2.5x + (-3). 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 342
Translate every coordinate equally · practice 38
Translate the point (1, 1) by the vector (4, 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 343
Recover a right-triangle distance · practice 34
A right triangle has perpendicular legs 9 and 9. Find its hypotenuse. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 344
Follow decimal place-value scaling · practice 35
Write 6 × 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 345
Separate trend from causal claims · practice 37
For inputs [1, 2, 3, 4, 5] and corresponding outputs [7, -2, 1.5, 5, -4], 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 346
Accumulate circular cross-sections · practice 36
Find the volume of a cylinder with radius 4 and height 5. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 347
Bracket a principal square root · practice 38
Enclose √112 after 9 bisections starting from [0, 112]. 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 348
Distinguish length and area multipliers · practice 38
Dilate a rectangle with sides 4 and 6 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 349
Connect slope and a linear rule · practice 39
For the line y = -1x + (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 350
Locate simultaneous solutions · practice 39
Solve the simultaneous equations y = 0x and y = -2.5x + (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 351
Recover a right-triangle distance · practice 35
A right triangle has perpendicular legs 7 and 12. Find its hypotenuse. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 352
Follow decimal place-value scaling · practice 36
Write 6.5 × 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 353
Separate trend from causal claims · practice 38
For inputs [1, 2, 3, 4, 5] and corresponding outputs [4, 1, -2, -5, -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 354
Accumulate circular cross-sections · practice 37
Find the volume of a cylinder with radius 2 and height 1.5. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 355
Bracket a principal square root · practice 39
Enclose √88 after 5 bisections starting from [0, 88]. 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 356
Distinguish length and area multipliers · practice 39
Dilate a rectangle with sides 1.5 and 1.75 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 357
Connect slope and a linear rule · practice 40
For the line y = -2.5x + (-1), 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 358
Locate simultaneous solutions · practice 40
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 359
Translate every coordinate equally · practice 39
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 360
Recover a right-triangle distance · practice 36
A right triangle has perpendicular legs 3 and 6. Find its hypotenuse. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapter