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New exercises from Khan Academy 2021-07-25T16:04:56.000000
Atualizado: 20 horas 41 minutos atrás

Multiply without regrouping

dom, 2021-07-25 16:04
Multiply 2- or 3-digit numbers by 1-digit numbers. No regrouping or carrying.

Patterns with numbers

dom, 2021-07-25 16:04
Generate terms in a pattern when given a rule.  Identify features of a pattern that are not explicit to the rule itself.

One-step addition & subtraction equations

qui, 2021-07-22 21:23
Practice solving equations in one step by adding or subtracting the same value from both sides.

Einstein's photoelectric equation

qui, 2021-07-22 09:09
Let's practice some problems to better understand and apply Einstein's photoelectric equation.


qua, 2021-07-21 19:14
Use combinations to count how many ways you can select k objects from n total objects if order doesn't matter.

Photoelectric effect: negative collector

ter, 2021-07-20 10:08
Let's practice some problems to better understand the variation of photocurrent and the physics behind it when we have a negative collector in photoelectric effect.

Area and the distributive property

dom, 2021-07-18 20:21
Use area models to represent the distributive property in finding area of rectangles.

Understand area

dom, 2021-07-18 20:20

Equation of a hyperbola from features

dom, 2021-07-18 19:25
Given some features of a hyperbola, find its equation.

Identify quadrilaterals

dom, 2021-07-18 18:40
Identify squares, rectangles, and rhombuses.

International trade and public policy

dom, 2021-07-18 18:39
Practice what you have learned about the impact of trade, tariffs, and quotas on consumer and producer surplus in this exercise.

Find critical points of multivariable functions

dom, 2021-07-18 14:41
Given a scalar field in 2D or 3D, select the choice with all its critical points.


dom, 2021-07-18 14:40
Test your knowledge of various biotechnologies!

Powers of powers

sex, 2021-07-16 18:56
Rewrite powers of powers. For example, (x²)⁵ can be written as x¹⁰.

Evaluate radical expressions challenge

sex, 2021-07-16 16:13
Evaluate numerical radical expressions using the properties of exponents.

Properties of exponents (rational exponents)

sex, 2021-07-16 16:11
Rewrite some elaborate exponential expressions that involve fractional exponents and radicals.

Properties of exponents intro (rational exponents)

sex, 2021-07-16 16:03
Rewrite exponential expressions (where the exponent can be a fraction) using the properties of exponents.

Rational exponents challenge

sex, 2021-07-16 15:57
Choose equivalent forms of radical and exponential expressions.

Fractional exponents

sex, 2021-07-16 15:56
Evaluate numerical expressions with rational exponents, and convert between equivalent forms of exponential and radical expressions.


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