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 4 practice chapters
121–140 of 750 matching chapters · Page 7 of 38
Clear filtersGrade 4 · Chapter 121
Test divisibility by making full groups: whole number to test: 9; candidate factor: 5
At a classroom activity, 9 counters are packed in groups of exactly 5. Find the number of complete groups and the remainder, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 122
Add eighths and regroup whole units: first count of eighths: 5; second count of eighths: 8
A measured supply at a classroom activity combines 5/8 of a unit with another 8/8 of the same unit. Find the exact sum in a common fractional unit, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 123
Repeat a fractional amount: quarters in each portion: 3; number of portions: 5
A plan for a classroom activity calls for 5 portions, each 3/4 of a unit. Find the amount needed for the original portions, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 124
Keep cents aligned when adding money: first amount: 220 cents; second amount: 175 cents
An illustrated budget for a classroom activity has costs of $2.20 and $1.75. Find the original combined cost in cents and dollars, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 125
Combine metres with extra centimetres: whole metres: 5; extra centimetres: 73
A measurement for a classroom activity consists of 5 whole metres and 73 extra centimetres. Find the full measurement in centimetres, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 126
Scale one digit through powers of ten: digit: 2; places left of ones: 2
A place-value demonstration for a classroom activity moves the digit 2 through 2 places to the left of ones. Find the digit's value after the stated moves, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 127
Multiply every expanded place-value part: three-digit amount: 190; equal copies: 5
At a classroom activity, 5 identical supply sets each contain 190 counters. Find the number of objects in all the original sets, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 128
Test divisibility by making full groups: whole number to test: 88; candidate factor: 11
At a classroom activity, 88 counters are packed in groups of exactly 11. Find the number of complete groups and the remainder, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 129
Add eighths and regroup whole units: first count of eighths: 1; second count of eighths: 5
A measured supply at a classroom activity combines 1/8 of a unit with another 5/8 of the same unit. Find the exact sum in a common fractional unit, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 130
Keep cents aligned when adding money: first amount: 600 cents; second amount: 485 cents
An illustrated budget for a classroom activity has costs of $6.00 and $4.85. Find the original combined cost in cents and dollars, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 131
Combine metres with extra centimetres: whole metres: 4; extra centimetres: 35
A measurement for a classroom activity consists of 4 whole metres and 35 extra centimetres. Find the full measurement in centimetres, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 132
Scale one digit through powers of ten: digit: 3; places left of ones: 5
A place-value demonstration for a classroom activity moves the digit 3 through 5 places to the left of ones. Find the digit's value after the stated moves, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 133
Multiply every expanded place-value part: three-digit amount: 141; equal copies: 2
At a classroom activity, 2 identical supply sets each contain 141 counters. Find the number of objects in all the original sets, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 134
Test divisibility by making full groups: whole number to test: 68; candidate factor: 7
At a classroom activity, 68 counters are packed in groups of exactly 7. Find the number of complete groups and the remainder, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 135
Add eighths and regroup whole units: first count of eighths: 6; second count of eighths: 1
A measured supply at a classroom activity combines 6/8 of a unit with another 1/8 of the same unit. Find the exact sum in a common fractional unit, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 136
Keep cents aligned when adding money: first amount: 75 cents; second amount: 295 cents
An illustrated budget for a classroom activity has costs of $0.75 and $2.95. Find the original combined cost in cents and dollars, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 137
Combine metres with extra centimetres: whole metres: 3; extra centimetres: 97
A measurement for a classroom activity consists of 3 whole metres and 97 extra centimetres. Find the full measurement in centimetres, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 138
Scale one digit through powers of ten: digit: 4; places left of ones: 3
A place-value demonstration for a classroom activity moves the digit 4 through 3 places to the left of ones. Find the digit's value after the stated moves, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 139
Multiply every expanded place-value part: three-digit amount: 992; equal copies: 6
At a classroom activity, 6 identical supply sets each contain 992 counters. Find the number of objects in all the original sets, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapterGrade 4 · Chapter 140
Test divisibility by making full groups: whole number to test: 48; candidate factor: 3
At a classroom activity, 48 counters are packed in groups of exactly 3. Find the number of complete groups and the remainder, explain the calculation, and check a related question.
Question · Worked solution · Animated example
Open practice chapter