Section 1
📘 Writing Numbers Through 999
New Concept
Whole numbers are the counting numbers and the number zero.
What’s next
Next, you’ll practice writing and comparing numbers up to 999, translating between digits and words.
In this Grade 4 Saxon Math lesson, students learn to write whole numbers through 999 using standard number words, including correct hyphenation for two-digit numbers greater than twenty and proper three-digit number naming without using the word "and." Students also practice converting between written word form and digit form, comparing whole numbers using place value, and arranging numbers in order from least to greatest.
Section 1
📘 Writing Numbers Through 999
Whole numbers are the counting numbers and the number zero.
Next, you’ll practice writing and comparing numbers up to 999, translating between digits and words.
Section 2
Whole numbers
Whole numbers are the counting numbers and the number zero.
The number 42 is a whole number. The number 987 is a whole number. The number 0 is a whole number.
Imagine you're counting treasures in a chest—one, two, three... those are counting numbers! Now, what if the chest is empty? You'd have zero treasures. Whole numbers are simply all your counting numbers plus their buddy, zero. They represent complete items without any messy fractions or decimal parts involved, keeping your math clean and simple.
Section 3
Reading Math
The names of two-digit numbers greater than twenty that do not end in zero are written with a hyphen.
The number 51 is written as 'fifty-one'. The number 87 is written as 'eighty-seven'. The number 33 is written as 'thirty-three'.
When you write out two-digit numbers in words, think of the hyphen as a special connector that holds the words together. For any number from twenty-one to ninety-nine (as long as it doesn't end in zero), you need this little dash to properly link the tens part and the ones part, like making 'seventy' and 'four' become 'seventy-four'.
Section 4
We do not use the word and when writing whole numbers.
To write three-digit numbers, we first write the number of hundreds and then we write the rest of the number. We do not use the word and when writing whole numbers.
The number 313 is written as 'three hundred thirteen'. The number 705 is written as 'seven hundred five'. The number 444 is written as 'four hundred forty-four'.
When writing a number like 525, you should state it as 'five hundred twenty-five.' You must avoid sneaking the word 'and' in there, as in 'five hundred and twenty-five.' In the math world, the word 'and' is a secret password reserved for separating whole numbers from their decimal or fractional parts, so we save it for later use.
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Section 1
📘 Writing Numbers Through 999
Whole numbers are the counting numbers and the number zero.
Next, you’ll practice writing and comparing numbers up to 999, translating between digits and words.
Section 2
Whole numbers
Whole numbers are the counting numbers and the number zero.
The number 42 is a whole number. The number 987 is a whole number. The number 0 is a whole number.
Imagine you're counting treasures in a chest—one, two, three... those are counting numbers! Now, what if the chest is empty? You'd have zero treasures. Whole numbers are simply all your counting numbers plus their buddy, zero. They represent complete items without any messy fractions or decimal parts involved, keeping your math clean and simple.
Section 3
Reading Math
The names of two-digit numbers greater than twenty that do not end in zero are written with a hyphen.
The number 51 is written as 'fifty-one'. The number 87 is written as 'eighty-seven'. The number 33 is written as 'thirty-three'.
When you write out two-digit numbers in words, think of the hyphen as a special connector that holds the words together. For any number from twenty-one to ninety-nine (as long as it doesn't end in zero), you need this little dash to properly link the tens part and the ones part, like making 'seventy' and 'four' become 'seventy-four'.
Section 4
We do not use the word and when writing whole numbers.
To write three-digit numbers, we first write the number of hundreds and then we write the rest of the number. We do not use the word and when writing whole numbers.
The number 313 is written as 'three hundred thirteen'. The number 705 is written as 'seven hundred five'. The number 444 is written as 'four hundred forty-four'.
When writing a number like 525, you should state it as 'five hundred twenty-five.' You must avoid sneaking the word 'and' in there, as in 'five hundred and twenty-five.' In the math world, the word 'and' is a secret password reserved for separating whole numbers from their decimal or fractional parts, so we save it for later use.
Book overview
Jump across lessons in the current chapter without opening the full course modal.
Continue this chapter