Slide 2 Slide 3 Folks back in the very olden days would make
marks to stand for the amounts of things. | | | | Slide 4 Thats
fine for a few but when you see | | | | | | | | | | | | | | | | | |
Then understanding how many you have is challenging, especially if
you dont even have names for the bigger numbers. Slide 5 We use a
system where we recycle the same ten symbols but theyre 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. Slide 6 Heres 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. Slide 7 Slide 8
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. Slide 9 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. Slide 10 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 Slide
11 Once we get to a hundred, we simply say how many of that bigger
place we have, and then whatever is left. We dont use and; its
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 Slide 12 Write these
out in letters and words: 145 502 383 698 61 280 551 738 Slide 13
145 502 383 698 61 280 551 738 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 Slide 14 Six hundred twenty-five Four hundred
eighty-six Three hundred fifty Three hundred five Three hundred
ninety-five Slide 15 Six hundred twenty-five 625 Four hundred
eighty-six 486 Three hundred fifty 350 Three hundred five 305
(there arent any tens but we have to say that with zero!) Three
hundred ninety-five 395 Slide 16 Theres lots of it here:
http://www.funbrain.com/numwords/index. html
http://www.funbrain.com/numwords/index. html
http://www.aaamath.com/nam.htm if you prefer clicking to spelling
the words out http://www.aaamath.com/nam.htm
