hundred thousand
10 ten thousands or 100,000
standard form
3 million 5 hundred in standard form is 3,000,500
word form
The word form of 7,010,000 is seven million ten thousand
periods
a group of three places commonly used for reading numbers that are 1,000 or above.
millions
10 hundred thousands or 1,000,000
place value
The value of a digit as determined by its place. In 5,873, the digit 8 is in the hundreds place, so it stands for 800.
expanded form
768,540 = 700,000 + 60,000 + 8,000 + 500 + 40 in expanded form
greater than (>)
512,374 > 412,374 (512,374 is greater than 412,374)
less than (<)
412,374 < 512,374 (412,374 is less than 512,374)
round
To approximate a number to the nearest ten, hundred, thousand (and so on). To round any number: look on place to the right of the digit you want to round to.
estimate
http://studyzone.org/testprep/math4/d/estimatingaddsubl.cfm
front-end estimation with adjustment
Take the value of the front-end, or left most, digits. Then add or subtract the values.
compatible numbers
Pairs of numbers close to the original number pairs that are easy to add, subtract, multiply, or divide mentally. Used to estimate sums, differences, products and quotients.
The numbers 240 and 6 are compatible numbers used for estimating 246/6