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Word Problems

Browse Elementary Square Roots
Stars indicate particularly interesting answers or good places to begin browsing.

Selected answers to common questions:
    Table of Squares & Square Roots, 1-100.

Multiplying by a Power of Ten [10/31/2001]
Give the power of ten that the decimal must be multiplied by to eliminate the decimal point in the numbers: 3.825; 6.91; 19.207.

Scientific Notation [08/19/1997]
Write these numbers in scientific notation: 55000, 0.55, x...

Scientific Notation: Exponents [8/29/1996]
What do you call 0.000000000000000000000002?

Square roots [11/27/1994]
What are square roots and how do they work?

What is an exponent? [8/8/1996]
Can you explain what an exponent is?

Calculators and e+ [09/27/1998]
What does the "e+" mean on a calculator?

Evaluating Large Numbers [06/11/1998]
How do you evaluate 2^71 * 3? Can you use logarithms?

Explaining Scientific Notation [10/21/2002]
Could you try to explain scientific notation to me?

The Meaning of Powers, such as Squares and Cubes [3/14/1996]
What does the power mean? Like 5 to the power of 2?

Multiplying Numbers Written in Scientific Notation [06/27/2004]
How do I multiply two numbers that are written in scientific notation?

Numbers with Large Exponents [08/22/2001]
How many zeros end the number 2^300 * 5^600 * 4^400?

Operations in Scientific Notation [08/30/2001]
How do you add, multiply, and divide in scientific notation?

Ordering the Operations [11/10/1998]
Why does the order of operations have to be in that order? Who set that specific order of operations?

Perfect Square: Definition [10/24/1999]
What is a perfect square?

Power of 120 [06/12/2001]
Is there a quick way to work out 1.05 to the power of 120?

Scientific Notation [09/16/1997]
I don't understand how you get the answer: 5x10 to the 3rd power = 5,000; 5x10 to the -3rd power = -5,000.

Scientific Notation and Engineering Notation [10/10/2001]
Convert 0.000 000 000 000 000 000 000 3 to: a) scientific notation; b) engineering notation.

Significant Digits in Measurement [08/13/2001]
I understand that there are rules to determine the significant digits in measurement, but aren't all digits significant, especially zeros for place value?

Simplifying Square Roots [9/4/1995]
I am in grade 2. What is the square root of 812 ?

Square Root [4/4/1996]
What does square root mean?

The Term Power [10/23/2001]
One of my students asked how we came to use the term power to express the number of times we multiply a number by itself.

Using Scientific Notation [11/01/1997]
I know it's used to multiply large numbers to get a correct answer, but I don't understand how to do it.

Value of 9^(9^9)? [10/21/2002]
What is the value of 9^(9^9)?

Who Invented the Square Root? [12/11/1996]
I've only seen long, stringy roots!

Writing 'Square Foot' [05/05/2001]
Is there a symbol for "square foot"?

The Zero Power of Two [12/10/1998]
Why is 2 to the 0 power equal to 1? I don't understand how a number can be multiplied by itself zero times.

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