Show:
TBD1
Ways to Add
Subtract
Multiplication
TBD2
100

An answer close to the exact answer.

What is an estimate? 

100

When you use expanded forms to add it is called

partial sum addition 

100

Define: subtract 

to take away!

100

What is a helper fact?

a math fact you know well that you use to solve another math problem?

100
A graph that uses pictures or symbols to represent data is called

a picture graph

200

Estimating can be used to help ________ your answer. 

Check

200

The first step to partial sum addition is to 

make the number in the expanded form. 

200
In subtraction you have the minuend, subtrahend, and the

difference!

200

If you know 5 x 5 and that helps you find out 5 x6 which is the helper fact?

5 x5 

200

Does a picture graph need to have a scale? Yes or No?

Yes

300

___________ can help you estimate, because it helps you find a close-but-easier number. 

Rounding!

300

One way to add where you draw lines to separate the 1s, 10s, and 100s places. Then you ad each place-value column and write its sum. If any sum is a 2 digit number you trade with the column on the left. 

Column Addition

300

If the first step you use to subtract is to expand the numbers then you are using what type of subtraction?

Expand and Trade Subtraction


300

If you know 5 x5 and that helps you find 5 x6 what strategy are you using?

Adding a group strategy 

300

Your scale is that x = 2. How would you represent 1? 

/

or 

\

400

The opposite of estimation is....

being exact/ being precise

400

What is the difference between partial sums and column addition

one has columns while one uses expanded form

one uses trades.


400

The inverse of subtraction is

addition!

400

If you know 5 x5 and use it to solve 5 x4 what strategy are you using to solve the fact?

subtracting a group strategy. 
400

A type of problem with in numbers, out umbers, and a rule that changes the in numbers to out numbers is called 

What's my rule. 

500

A rough estimate to help you solve a problem, check an answer, or when an exact answer cannot be found is called 

ballpark estimate (ballpark figure)

500

Are you all mathematicians?

YES!

500

When you find the difference between two numbers by counting up from the smaller number to the larger number it is called

Counting Up Subtraction 

500

What is the turn around rule?

The factors in multiplication can be in any order and still have the same product. 

500

Write 3 other names for the number 15

Answers vary!