Across
- 2. word name A combination of digits and words. For example, the number 7,800,000 has a short words name of 7 million, 800 thousand
- 5. form A number written in the usual way, using place values and digits. For example: 3,410
- 7. When writing large numbers, each group of 3 digits starting from the right is called a period. For example, in 42,376, “376” is in the first period and “42” is the start of the second period.
- 10. powers: When the exponent is negative, for example: 10-4
- 12. shows or tells
- 13. Numbers below zero are called negative numbers. They are written with a “-” in front of the number. For example, -10
- 14. name A number written using words. For example: Three thousand, four hundred ten
- 15. Using numbers, measurements and shapes to figure things out
- 16. form A way to write numbers. It consists of a base and an exponent.
- 17. form Numbers written out in an expanded way. For example, the number 389 in expanded form is written as: 300+80+9
- 19. Matching or being similar to something else
- 20. Tells you what to do with the base
- 21. Numbers above zero are called positive numbers.
Down
- 1. to use a simpler number that is close enough to the actual number
- 3. A thousand billions
- 4. The number with which something is done
- 6. One of the ten marks we use to write numbers: 0,1,2,3,4,5,6,7,8 and 9 are the digits we use.
- 7. value The value of a place is called its place value. For example, in the number 258, the number “2” is in the hundreds place.
- 8. Put in the correct order
- 9. Numbers which are written with a dot to show where the fraction part of the number starts. The first digit after the dot is tenths.
- 11. to make bigger
- 14. numbers A number for whole amounts, not parts of things, like 3 or 456 or 9088.
- 17. Numbers which can be written in “exponent form.” An exponent tells how many times to use the base as a factor. For example 34
- 18. In mathematics, “power” is another way of telling an exponent. For example: 3 to the fourth power means 34 or 3x3x3x3