Across
- 3. diagram- A drawing that looks like a piece of tape, used to model expressions. Also called a bar model.
- 5. rate- A unit rate is a rate in which the second number (usually written as the denominator) is 1, or 1 of a quantity. For example, 1.9 children per family, 32 miles per gallon, and 3 flavors of ice cream/1 banana split are unit rates. Unit rates are often founded by scaling other rates.
- 6. A reference number that can be used to estimate the size of other numbers. For work with fractions, 0, 1/2, and 1 are good benchmarks. We often estimate fractions or decimals with benchmarks because it is easier to do arithmetic with them, and estimates often give enough accuracy for the situation. For example, many fractions and decimals such as 37/50, 5/8, 0.43, and 0.55 can be thought of as being close to 1/2. You might say 5/8 is between 1/2. We also use benchmarks to help compare fractions and decimals. For example, we could say that 5/8 is greater than 0.43 because 5/8 is greater than 1/2 and 0.43 is less than 1/2.
- 8. Two numbers whose sum is 0. For example, -3 and 3 are opposites. On a number line, opposites are the same distance from 0 but in different directions from 0. The number 0 is its own opposite.
- 10. A comparison of two quantities expressed with a phrase such as the ratio of 3 to 5 which means 3 for every 5. Such ratio comparisons are often written as common fractions and in the special notation 3 : 5.
- 12. table- A table that shows the value of a single item in terms of another item. It is used to show equivalent ratios of the two items.
- 13. value- The absolute value of a number is its distance from 0 on the number line. Numbers that are the same distance from 0 have the same absolute value.
Down
- 1. “out of 100.” A percent is a fraction in which the denominator is 100. When we write 68%, we mean 68 out of 100, 68/100, or 0.68. We write the percent sign ( % ) after a number to indicate percent.
- 2. A fraction written in base ten numeration. For example, the fraction 375/1000 = 0.375 because = + 7/100 + 5/1000.
- 4. fraction-A fraction in which the absolute value of the numerator is greater than the absolute value of the denominator. The fraction 5/2 means 5 halves is equivalent to 2½.
- 7. fractions- Fractions that are equal in value, but may have different numerators and denominators. For example 2/3 and 14/21 are equivalent fractions. The shaded part of this rectangle represents both 2/3 and 14/21.
- 9. number- A number that is written with both a whole number and a fraction. A mixed number is the sum of the whole number and the fraction. The number 2½ represents 2 wholes and a ½ and can be thought of as 2 + ½.
- 11. numbers- Any number that can be written as the quotient of an integer and a non - zero integer, such as 3/4, 13/4, 3/1, or -3/4.