Estimating Sums
& Differences
Adding and Subtracting Decimals
Writing Expressions
Evaluate Expressions
Vocabulary
100
Estimate using rounding. 38.23 + 11.84
What is 38 + 12 = 51
100
Add the decimals 43.28 + 31.45
What is 74.73
100

Add y and 84

y + 84

100

6.05 + m when m = 12.68

18.73

100

Expression

A math problem without an equal sign

200
Estimate using Rounding. 75.38 + 22.04
What is 75. + 22 = 97
200
Add the decimals 0.724 + 6.458
What is 7.182
200

18 more than q

q + 18

200

n - 42.41 when n = 50

7.59

200

Estimate 

To take an educated guess to get an answer close to the actual answer.

300

Estimate using Front-End Estimation 31.29 + 58.07

What is 30. + 50 = 80

300
Subtract the decimals 148.93 - 121.36
What is 27.57
300

decrease p by 3.2

p - 3.2 

300

Emily has h + 15 minutes of homework. evaluate when h = 20

35

300

Evaluate

To solve

400

Juan earns $15.63, $8.95 and $19.82 over a three day period. About how much does he earn? 

About $45

400

Subtract the decimals 20,700.675 - 700.775

What is 19,999.9

400

Leon has some pieces of paper. He uses 8 pieces. How many does Leon have now? 

n-8

400

3.12 less than v when v = 8.5

5.38

400

Algebraic Expression

An expression using variables and numbers 

500

Kathleen swims 1.13 mi and bikes 24.8 mi. About how far must she run to complete the final part of a 31.93mi triathlon?

About 6 miles

500

567.074 + 96.132 + 8.65 = 

671.856

500

Kamal completes 22 math problems on Monday and fewer problems on Tuesday. How many problems does Kamal complete on Tuesday?

22 - p 

500

q + 3.57 - p when q = 7.05 and p= 2.9

7.72

500

Variable 

A letter that takes place of an unknown value