Bridges Unit 1 Review

Subtraction Equations

100

16-9 =

7

200

12-___ = 9

3

300

_____ = 17-8

9

400

____- ____ = 4

Answers Vary

500

_____ = 21-10

11

Balancing Equations

100

9 + 6 = ____ + 10

5

200

5 + ___ = 8 + 6

9

300

7+6 = ____ + 8

5

400

7 + 3 = ____ + 9

1

500

_____ + 5 = 11 + 4

10

Addition Equations

100

18 = ____ + 5

13

200

9 + ____=16

7

300

4+3+7+5= _____

19

400

____ + ____ = 10

Answers vary

500

___ + ____ = 18

Answers Vary

Story Problems

100

The athlete has 15 basketballs and 6 soccer balls in a box. HOw many more basketballs than soccer balls are in the box?

15 - 6 = 9

OR

6 + 9 = 15

200

Henry says that 6 + 7 is a Doubles Plus One fact. Do you agree or disagree with Henry? Why or why not?

Henry is correct. 6 + 6 is a Doubles Fact. 6 + 7 is 1 more than 6 + 6, so it is a doubles plus one fact.

300

Jane's book is 16 centimeters long. The book is 8 centimeters longer than Jane's pencil. How long is her pencil? Which of the following represents this situation?

o 16+8= p         o p+16=8        o 8-p=16               

  o p+8=16

 p + 8 = 16

400

Ms. Nelson has 212 mystery books and adventure books in the library. Of the books, 96 of them are mystery books. How many are adventure books?

212-96 = 116 adventure books

500

Peyton measured a poster. The first side of the poster was 71 cm long. The second side was 56 cm long. HOw much longer was the first side than the second side of the poster?

71-56 = 15 cm

Multi Step Story Problems/Random

100

Darren says that all Doubles facts have odd sums. Do you agree with him? Why or why not?

Darren is incorrect. Examples: 2+2=4 1+1=2 5+5=10 All of these sums are even.

200

Jason has tomato plants in his backyard. This year the plants grew 127 tomatoes. Birds have eaten 19 of the tomatoes. 23 tomatoes were ruined by bugs. How many tomatoes was Jason able to pick?

85 tomatoes

127-19-23

300

18-9 is a Half fact. Write two other Half facts.

Examples vary.

14-7

12-6

20-10

400

James read 122 pages last week and 129 pages this week. Carly read 125 pages last week and 106 pages this week. Who read more pages in all during this week and last week? How many more pages did she read?

Rosa: 122 + 129 = 252

Amy: 125 + 106 = 231

252-231 = 21 pages; James read 21 more pages than Carly

500

Rex had 139 rocks in his rock collection last week and he added 135 this week. Greg had 133 rocks in his collection last week and he added 117 rocks this week. Who has more rocks in their collection? How many more do they have?

Rex: 139 + 114= 253

Greg: 133 + 119 = 252

Rex has more rocks in his collection.

253-252=1 He has one more rock than Greg.