Addition
Subtraction with regrouping
Rounding
Estimate
Vocabulary
100

Find the sum: 

300+356

656

100

Find the difference: 

162-27

135

100

Round 555 to the nearest 100

600

100

View the number line your teacher has for you! 

Give an estimate that would be way too high for the black highlight (within reason)

Answers vary 

100

Define product

the answer to a multiplication problem 

200

Find the sum:

689+216

905

200

Find the difference: 

576-295

281

200

Round 223 to the nearest 100 

300

200

View the number line your teacher has for you! 

Give an estimate that would be about right for the black highlight. 

Answers can vary 

200

Define rounding

a way to say a given number is closer to, based on place value 

300

Find the sum: 

256+375

631

300

Find the difference:

541-228

313

300

Round 245 to the nearest 10

250
300

There are 400 seats in the football stadium. 

There are 132 students coming from Susan's school and 303 students attending from Brett's school.

Will there be enough seats?  

No
300

Define equation

a statement that includes an equal sign. It tells us that what is one one side is equal to what is on the other side.

400

Find the sum: 

877+123

1,000

400

Find the difference: 

622-156

466

400

Round 892 to the nearest 10

890

400

There are 500 seats in the football stadium. 

There are 132 students coming from Susan's school and 303 students attending from Brett's school.

Brett estimates there will be about 50 empty seats. Do you agree?

Yes

400

Define expression 

includes at least 2 numbers and at least one math operation 

500

There are 56 markers in the drawer. 4 students each add 5 markers to the drawer. Let p be the the number of markers now in the drawer. 

Write the equation 

56-4x5=p

or 

p=56-4x5

500

There are 95 tickets in the jar. 2 students draw 5 tickets each. Let T be the number of tickets left in the jar. 

Write the equation 

95-2x5=T

or 

T=95-2x5

500

Round 101 to the nearest 10 and 100 

Nearest 10: 100 

Nearest 100: 100 

500

There are 500 seats in the football stadium. 

There are 132 students coming from Susan's school and 303 students attending from Brett's school.

Do you think there will be more or less than 50 empty seats? Why?

Yes 

500

Define algorithm 

a set of steps, or a strategy, used to solve a problem

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