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Rounding
Writing an Equation with a Variable
100
Karen has 4 marbles. She buys 7 more. She then gives her sister 3. How many marbles does she have now?
8
100
Jen has 3 packs of cards with 5 cards in each pack. She gives 4 to her brother. How many cards does she have now?
11
100
Luke earned 6 dollars for every lawn he mowed. If he mowed 3 lawns and he already had 4 dollars saved up, how much money does he have total?
$22
100

Round the following and simplify the expression to get a reasonable estimate:

(19 x 2) - 11

40-10=30

100

Frank has 12 small candy bars and 10 large candy bars. He gives his friend some of the candy bars. He has 8 candy bars left.

Write an equation with a variable to represent the problem.

12 + 10 - C = 8

200
Tyler scored 10 points. Andy scored 15. The bench players scored the rest of the points. If the team had 55 total points. How many points did the bench score?
30
200
Jason has 12 apples. He throws out 4 rotten ones. He cuts the rest of the apples into 4 slices. How many slices of apple does he have?
32
200
At band practice there were 9 rows of students with 8 students in each row and then another 7 students in the back. How many students were there total?
79
200

Round the following and simplify the expression to get a reasonable estimate:

(28 x 2) + 46

60 + 50=110

200

At the fair Adam bought 10 tickets. His sister gave him 3 of her leftover tickets. He used some of the tickets to ride the ferris wheel, so now he has 8 tickets left.

Write an equation with a variable to represent the story.

10 + 3 - T = 8

300
Amanda needs to reach 300 points to meet her AR goal. She gained 53 points in the first quarter. She earned 78 more in the second. How many more points will she need to score in the 3rd and 4th quarter to reach her end of the year goal?
169
300
George earns $12 an hour. He works for 8 hours. After work he spends $16 of the money he just earned. How much money does he have left?
$80
300
Jenny has read 35 pages. Over the next week she reads 12 pages a night. How many pages has she read by the end of the week?
119
300

Round the following and simplify the expression to get a reasonable estimate:

(52/5) + 17

10 + 20 = 30

300

There are 22 markers in the cup and 18 markers in the box. Sue is going to equally split the markers into boxes. Each box has 8 markers in it.

Write an equation with a variable to represent the story.

22 + 18 / B = 5

400
A zoo has 702 animals split into three sections. There are 205 in the arctic section and 187 in the forest section. How many animals are in the desert section?
310
400

There are 75 dogs at the park. 45 leave. How many PAWS are now at the park?

120

400
Henry has 48 shoes. He then makes 20 pairs of shoes. How many shoes does he have now?
88
400

Round the following and simplify the expression to get a reasonable estimate:

(17 x 3) - 38

60-40=20

400

There are 25 second graders and 15 third graders signed up to go on a field trip. They are split into equal group. Each group has 5 students.

Write an equation with a variable to represent the problem.

25 + 15 / G = 8

500
A high school has a student population of 9000. There are 2925 freshmen, 3280 sophomores, and 1094 juniors. How many seniors attend this school?
1701
500

There are 4 boxes with 10 computers in each. During the shipping process 36 get damaged. How many of the computers are undamaged?

4

500
There are 50 pages in each spiral notebook. Jen grabs 4 notebooks and James gets 9. How many pages do the two have combined?
650
500

Round the following and simplify the expression to get a reasonable estimate:

(4 x 32) - 19

120 - 20 = 100

500

A company tests 40 drones a day for 7 days. At the end of the week, some failed testing. However, 200 passed the testing.


Write an equation with a variable to represent the problem.

40 x 7 - F = 200

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