文档介绍：The world of numbers
about numbers
VS
2, 4, 6, 8…are even numbers, and 1, 3, 5, 7, 9…are odd numbers.
Question: 10 is an number and 45 is an number.
even
odd
2. (four point six three ) is a decimal number.
Question: Which of the following is a decimal numbers?
A. B. 5/8 C. 45%
3. ½, 5/8, 18/7 are fractions.
A. 分数 c. 小数
Question: what does “fraction” mean?
4. 3 plus 5 is 8.
Question: what is 3 plus 3?
3+3=
6
5. Three subtracted from twelve is nine.
.
Question: what is 10 minus 5?
10-5=
5
Twelve minus three is nine.
6. Two times three is six.
Two multiplied by three makes 6.
2× 3 =6
Question: What is 20 times 8?
20 × 8=
160
7. 30 divided by 6 is 5.
Question: what is 45 divided by 9?
45 ÷ 9=
5
8. equals ½.
What does “equal” mean?
9. 700 means 70 degrees.
900 means ?
to be the same with
=