Key Terms
What is value of a digit in a numeral based on its position; for example, the 7 in 274 has a value of 7 tens, or 70?
Place Value
What is 592 rounded to the nearest ten?
590 is 592 rounded to the nearest ten
You can compare whole numbers by counting the number of digits.
True.
Which is the better benchmark number if you are comparing 157 and 85? Is it (a) Ten, (b) One Hundred, or (c) One Thousand?
(b) One Hundred (100) because it lands between 157 and 85
What is one of the ten symbols (0, 1, 2, 3, 4, 5, 6, 7, 8, and 9) used to create numerals? (for example, the _______ 1, 2, and 3 make up the numeral 132)
Digit
What is 743 357 rounded to the nearest hundred?
743 400 is 743 357 rounded to the nearest hundred
When rounding, 5 or less will round down.
False. 4 or less rounds down.
Which is the better benchmark number if you are comparing 78 543 and 32 700? Is it (a) One Thousand, (b) Ten Thousand, or (c) Fifty Thousand?
(c) Fifty Thousand (50 000) because it lands between 78 543 and 32 700
What is a familiar number that can be used to understand the size of a number, to estimate a number, or to compare numbers, such as 100 000, 250 000, and 500 000?
Benchmark (Number)
What is 638 359 rounded to the nearest ten thousand?
640 000 is 638 359 rounded to the nearest ten thousand
There is more than one way to compare numbers.
True. You can compare a set of numbers in pairs, by counting the digits, using a benchmark or using place-value.
Which is the better benchmark number if you are comparing 122 417 and 85 113? Is it (a) One Million, (b) One Hundred Thousand, or (c) Ten Thousand?
(b) One Hundred Thousand (100 000) because it lands between 122 417 and 85 113
What is to estimate a number to the nearest ten, hundred, thousand, and so on, following a set of rules?
Round a Number
What is 173 537 rounded to the nearest hundred thousand?
200 000 is 173 537 rounded to the nearest hundred thousand
When choosing a benchmark, you should first plot one of the numbers on the number-line.
False. First, choose a benchmark between the two numbers.
Which is the better benchmark number if you are comparing 80 714 and 79 813? Is it (a) Eighty Thousand, (b) Thirty Thousand, or (c) Ten Thousand?
(a) Eighty Thousand (80 000) because it lands between 80 714 and 79 813
What is to order a set of numbers in pairs, but counting the digits, using a benchmark or using place-value?
Compare Numbers
What is 732 437 rounded to the nearest thousand?
732 000 is 732 437 rounded to the nearest thousand
You use a benchmark to estimate and compare large numbers.
Which is the better benchmark number if you are comparing 185 113 and 1 427 568? Is it (a) One Million, (b) One Hundred Thousand, or (c) Ten Thousand?
(a) One Million (1 000 000) because it lands between 185 113 and 1 427 568