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
241–260 of 750 matching chapters · Page 13 of 38
Clear filtersGrade 8 · Chapter 241
Bracket a principal square root · practice 26
Enclose √43 after 5 bisections starting from [0, 43]. 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 242
Distinguish length and area multipliers · practice 26
Dilate a rectangle with sides 1 and 2.25 by length factor 0.5. 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 243
Connect slope and a linear rule · practice 27
For the line y = 3.5x + (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 244
Locate simultaneous solutions · practice 27
Solve the simultaneous equations y = -3x and y = 0.5x + (-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 245
Translate every coordinate equally · practice 27
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 246
Recover a right-triangle distance · practice 23
A right triangle has perpendicular legs 7 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 247
Follow decimal place-value scaling · practice 25
Write 9 × 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 248
Separate trend from causal claims · practice 26
For inputs [1, 2, 3, 4, 5] and corresponding outputs [-0.25, -0.5, 3, 6.5, 6.25], 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 249
Accumulate circular cross-sections · practice 26
Find the volume of a cylinder with radius 3.5 and height 7. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 250
Bracket a principal square root · practice 27
Enclose √19 after 12 bisections starting from [0, 19]. 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 251
Distinguish length and area multipliers · practice 27
Dilate a rectangle with sides 2 and 4.25 by length factor 2.75. 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 252
Connect slope and a linear rule · practice 28
For the line y = 2x + (-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 253
Locate simultaneous solutions · practice 28
Solve the simultaneous equations y = -2x and y = 0.5x + (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 254
Translate every coordinate equally · practice 28
Translate the point (1, 1) by the vector (-3, -1). 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 255
Recover a right-triangle distance · practice 24
A right triangle has perpendicular legs 5 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 256
Follow decimal place-value scaling · practice 26
Write 9.5 × 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 257
Separate trend from causal claims · practice 27
For inputs [1, 2, 3, 4, 5] and corresponding outputs [0, -4, -0.5, 3, -1], 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 258
Accumulate circular cross-sections · practice 27
Find the volume of a cylinder with radius 1.5 and height 3.5. Follow the calculation, then test the quantities in the animated example.
Question · Worked solution · Animated example
Open practice chapterGrade 8 · Chapter 259
Bracket a principal square root · practice 28
Enclose √114 after 7 bisections starting from [0, 114]. 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 260
Distinguish length and area multipliers · practice 28
Dilate a rectangle with sides 5 and 5 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 chapter