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New exercises from Khan Academy 2020-04-09T16:20:51.786723
Actualizado: hace 9 mins 3 segs

Mar, 2020-02-25 15:14
Solve equations that have one rational expression whose numerator and denominator are polynomial expressions.

### Effect of concentration on pH change

Mar, 2020-02-25 09:50
Let's practice questions involving relationship between pH and concentration of H+ ions.

### Represent multiplication on the number line

Lun, 2020-02-24 17:05

Lun, 2020-02-24 17:02
Challenge problems involving equations which are reducible to quadratic equations

### Multiply fractions and whole numbers

Lun, 2020-02-24 16:57
Practice multiplying a whole number times a fraction.

### Equivalent whole number and fraction multiplication expressions

Lun, 2020-02-24 16:54
Practice seeing how one whole-number-times-fraction problem is the same as another.  Find equivalent multiplication expressions.

Lun, 2020-02-24 16:52
Let's learn how to read Roman numerals like LXVII by converting them into decimal numbers.

### Using magnification formula for lenses

Lun, 2020-02-24 11:20
Let's practice problems involving the magnification formula for lenses.

### Using the magnification formula for mirrors

Lun, 2020-02-24 09:39
Let's practice problems involving the magnification formula for mirrors.

### Square-root equations

Sáb, 2020-02-22 17:06
Solve square-root equations by first arranging them and then taking the square of both sides.

### Membrane transport

Sáb, 2020-02-22 00:52
Test your knowledge of membrane transport!

### Non-Mendelian genetics

Sáb, 2020-02-22 00:36
Test your knowledge of non-Mendelian genetics!

### Basic cell structures

Vie, 2020-02-21 23:55
Test your knowledge on the structures of cells!

Vie, 2020-02-21 22:48
Practice adding three-digit numbers. All sums are 1000 or less.

### Multiply by 9

Vie, 2020-02-21 22:38
Multiply 9 times a number less than or equal to 10.

### Multiply by 8

Vie, 2020-02-21 22:35
Multiply 8 times a number less than or equal to 10.

### Multiply by 7

Vie, 2020-02-21 22:30
Multiply 7 times a number less than or equal to 10.

### Multiply by 6

Vie, 2020-02-21 21:08
Multiply 6 times a number less than or equal to 10.

### Multiply by 3

Vie, 2020-02-21 21:06
Multiply 3 times a number less than or equal to 10.

### Multiply by 5

Vie, 2020-02-21 21:05
Multiply 5 times a number less than or equal to 10.