Presentation on theme: " Folks back in the very olden days would make marks to stand for the amounts of things. | | | |"— Presentation transcript:
Folks back in the very olden days would make marks to stand for the amounts of things. | | | |
That’s fine for a few… but when you see | | | | | | | | | | | | | | | | | | Then understanding how many you have is challenging, especially if you don’t even have names for the bigger numbers.
We use a system where we recycle the same ten symbols – but they’re worth more in a different position, in the same way that a ten dollar bill is worth more than a 1 dollar bill, even if the piece of paper is the same size.
Here’s a page that shows the numbers one through twenty-one (1-21) and pictures of bugs, in the amount each number stands for, beside them. If this is familiar, speed on through; if not, feel free to take some time with each page.
The words for 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 are: one, two, three, four, five, six, seven, eight, nine and ten. The words for 11, 12, 13, 14, 15, 16, 17, 18, 19 and 20 are: eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen and twenty.
After twenty, there is a pattern to the words: 10 ten 20 twenty 30 thirty 40 forty 50 fifty 60 sixty 70 seventy 80 eighty 90 ninety 100 one hundred If the ones place has more than zero, the word is formed by using the ten's place word, a hyphen, and then the ones place word.
Examples are: 38 is thirty-eight 84 is eighty-four 25 is twenty-five 141 is one hundred forty-one 308 is three hundred eight 650 is six hundred fifty
Once we get to a hundred, we simply say how many of that bigger place we have, and then whatever is left. We don’t use and; it’s reserved for fraction parts like one *and* a half hours or one *and* three tenths of a mile. 108 is one hundred eight 441 is four hundred forty-one 980 is nine hundred eighty
Write these out in letters and words:
One hundred forty-five five hundred two three hundred eighty-three six hundred ninety-eight Sixty-one two hundred eighty five hundred fifty-one seven hundred thirty-eight
Six hundred twenty-five Four hundred eighty-six Three hundred fifty Three hundred five Three hundred ninety-five
Six hundred twenty-five 625 Four hundred eighty-six 486 Three hundred fifty 350 Three hundred five 305 (there aren’t any tens – but we have to say that with zero!) Three hundred ninety-five 395
There’s lots of it here: html html if you prefer clicking to spelling the words out