2.9 Reasonable Answers

Reorder the following least to greatest

• -5

• 31

• 0

• 13

• 310

The animal shelter has space for 800 animals. There were already 468 animals at the shelter. After a storm, 192 more animals were rescued and brought to the shelter. Is it reasonable to say the shelter has room for about 100 more animals?

• yes

• no

The animal shelter has space for 800 animals. There were already 468 animals at the shelter. After a storm, 192 more animals were rescued and brought to the shelter. How many more animals can the shelter take in? *no label

Elaine jumped rope 175 times without missing, and Trevor jumped rope 10 fewer times than Elaine, without missing. Claire jumped rope 182 times without missing, and Zane jumped rope 153 times without missing. Claire said she and Zane had a higher total number of jumps than Elaine and Trevor. The image shows how she solved the problem. Is Claire's work and answer reasonable?

• yes, 165 is significantly less than 335

• yes, 165 is about 200 and 335 is about 300, and 300 is greater than 200

• no, Trevor jumped 165 and Elaine jumped 175 which makes their total 340 which is more than 335

• no, 165 is greater than 335

Mrs. Connolly hid 115 prizes around the school. She put 80 prizes inside the building and 35 outside on the playground. Her students have found 67 prizes inside and 18 prizes on the playground. How many total prizes do students still need to find? *no label

Mrs. Connolly hid 115 prizes around the school. She put 80 prizes inside the building and 35 outside on the playground. Her students have found 67 prizes inside and 18 prizes on the playground. Is there are greater number of prizes still to be found inside or outside the building?

• inside, there are 13 prizes to be found inside, and 17 to be found outside

• inside, there are 67 prizes to be found inside, and 18 to be found outside

• outside, there are 35 prizes to be found inside, and 97 to be found outside

• outside, there are 13 prizes to be found inside, and 17 to be found outside

Match the following

• a number close to its actual value

• associative property

• a set of numbers that follow a certain order

• estimate

• when you add zero to a number the sum is that number

• pattern

• rename a number using place value

• regroup

• the grouping of the addends does not change the sum

• identity property

Match the following

• the order of the addends does not change the sum

• commutative property

• makes sense

• parentheses

• result of addition

• sum

• result of subtraction

• difference

• tells you which operations to group in a number sentence

• reasonable

783 + ___ = 793

• 0

• 1

• 10

• 100

7,045 + ___ = 7,045

• 0

• 1

• 10

• 100