Big numbers in pieces
You learn to split big numbers into pieces, to write them or find the value of a digit.
How to work it out
- Cut a number word into pieces, or a number into groups of three digits.
- Write each piece of a word as a number, and add the pieces.
- To find the value of a digit, find its place by counting from the right.
- Multiply the digit by the value of that place.
Th1,000
—
H100
3
T10
1
O1
2
300 + 10 + 2=312
three thousand four hundred and eight
- Cut the word into pieces: three thousand, four hundred, eight.
- Write each piece as a number: 3,000, 400 and 8.
- Add: 3,000 + 400 + 8 = 3,408.
More examples
five hundred and eighty
- Cut the word into pieces: five hundred, eighty.
- Write each piece as a number: 500 and 80.
- Add: 500 + 80 = 580.
What is the value of the 4 in 45,120?
- Cut the number into groups of three: 45 and 120.
- The 4 is in the thousands group, in the ten thousands place.
- Do 4 × 10,000 = 40,000.
Th1,000
—
H100
0
T10
0
O1
4
What is the value of the 6 in 608,734?
- Cut the number into groups of three: 608 and 734.
- The 6 is at the front of the thousands group, in the hundred thousands place.
- Do 6 × 100,000 = 600,000.
Th1,000
—
H100
0
T10
0
O1
6