Chapter 1 Math test study guide

Remember:

When you are rounding a number you should:

·       Underline the digit that is in the place that you are rounding to.

·       Look at the digit to the right of the digit that you are rounding to.

·       If the digit to the right is 5 or above you have to add one to the underlined digit.

·       If the digit to the right is below 5 then you leave the underlined digit alone.

·       After you do that you turn all the digits to the right of the underlined digit to zero’s.

Example:

Round 865 to the nearest hundred

The 8 is in the hundreds place so you would underline the 8. 865

The 6 is the digit to the right and it is five and above so the 8 becomes a nine. Then all the digits to the right of the 8 have to turn to zeroes. 865 rounded to the nearest hundred is 900.

Remember:

Expanded form means to stretch it out, for example:

4,362 in expanded form is 4,000+300+60+2

Word form means to write it in words, for example:

Four thousand, three hundred, sixty two

And standard form is the regular number: 4,362

To order numbers means to put them in order from least to greatest or greatest to least. You will be given groups of numbers to put in order from least to greatest or greatest to least on the test. If you get confused remember to look at the place value of each number.

Example: ( 235, 234, 232 240, 300)

Least to greatest: 232, 234, 235, 240, 300

Greatest to Least: 300, 240, 235, 234, 232

To compare numbers is to know which number is larger or smaller than the other. We use (< or >) to tell which number is larger or smaller than the other.

Example: 456 > 379

We will review all of this in class however, you also need to do these practice sheets at home in preparation for the test.