Question

1. read each story problem. identify the unknown quantity, and write the addition or subtraction expression that is described. finally, evaluate your expression using the information given in column four.

story problem	description with units	expression	evaluate the expression if:	show your work and evaluate

( 7 + 2 )
( 9 )
sammy has 9 baseballs. |

ella wrote 8 more stories than anna in the fifth grade.

let ( a ) represent the number of stories anna wrote

anna wrote 10 stories in the fifth grade.

( a = 10 ) | |

lisa has been dancing for 3 more years than danika.

let ( d ) represent the number of years danika danced for

danika has been dancing for 6 years.

( d = 6 ) | |

the new york rangers scored 2 fewer goals than the buffalo sabres last night.	let		the rangers scored 3 goals last night.
george has gone camping 3 times fewer than dave.			george has gone camping 8 times.

1. if george went camping 15 times, how could you figure out how many times dave went camping?

Explanation:

Problem 1 (Ella's Stories)

Step1: Define Expression

Let \( a \) be Anna's stories. Ella has \( a + 8 \).

Step2: Substitute \( a = 10 \)

\( 10 + 8 = 18 \)

Step1: Define Expression

Let \( d \) be Danika's years. Lisa has \( d + 3 \).

Step2: Substitute \( d = 6 \)

\( 6 + 3 = 9 \)

Step1: Define Expression

Let \( r \) be Rangers' goals, \( s \) be Sabres' goals. \( r = s - 2 \). Given \( r = 3 \), find \( s \): \( s = r + 2 \).

Step2: Substitute \( r = 3 \)

\( 3 + 2 = 5 \)

Answer:

Expression: \( a + 8 \); Evaluation: \( 10 + 8 = 18 \) (Ella wrote 18 stories)

Problem 1 (Lisa's Dancing)