Lesson 2-1 for exercise sets. Chapter 2 31Practice & ActivitiesWrite each as a numerical expression.
1.the sum of 1.5 and 3 2.8 increased by 5 3.half the product of 6 and 3Write each as an algebraic expression. Use nas the variable.
4.a number decreased by 3.5 5.10 divided by twice a number 6.7 less than half a number7.two years younger than Bailey 8.one third of the students9.4 multiplied by the sum 10.the difference when a number
of a number and 5 doubled is subtracted from 3Write a word phrase for each expression.
11. 3 n 12. 13. 4 a |6|14.5(a 1) 15. 16. 2 n 317.Discuss and Write Does the phrase “5 subtracted from x” mean the same
as the phrase “the difference between 5 and x”? Explain.10
2 nx 12
2You can also write word phrases from mathematical expressions.
Mathematical Expression Word Phrases|3| aAddition Expression • the opposite of the absolute value of negative 3 plusa- the sumof the opposite of the absolute value of negative 3 and a
- the opposite of the absolute value of negative 3 increased bya
- aadded tothe opposite of the absolute value of negative 3
- amore thanthe opposite of the absolute value of negative 3
|b| 7Subtraction Expression • the differencebetween the absolute value of band 7- 7 subtracted fromthe absolute value of b
- the absolute value of bminus 7
- 7 less thanthe absolute value of b
- the absolute value of bless 7
- the absolute value of bdecreased by 7
5 •n^3 or 5n^3Multiplication Expression • 5 timesncubed- 5 timesnto the third power
- the productof 5 and ncubed
- ncubed multiplied by 5
9 xor ^9
xDivision Expression- negative nine divided byx
- the quotientof negative 9 and x