Show:
Subtracting Integers
Subtracting Integers/ Base Ten
Word Problems
Subtracting Decimals
Subtracting Whole Numbers
100

What are integers?

Negative or positive numbers that can be found on a number line
100
What does K.C.C. stand for ?

Keep the sign of the first number

change subtraction to addition

change the sign of the second number.

100

What is most important to remember when solving word problems?

Annotate and write your units!

100

What can be used as a place holder when subtracting decimals?

0
100

What is the next unit we will be working on in Intensive Math ?

Multiplication

200

What are the two methods we learned when subtracting integers?

Keep change change and using counters.

200
Solve the following number sentence using Base 10 Blocks : 152 - 30 =

122 

200

Create a word problem that matches this number sentence:

13 - 7 = 

6 _____

200

What must be lined up when subtracting/adding decimals?

Place values and the decimal point
200

What is is called when you turn one hundred into 10 tens, or one ten into 10 ones?

Borrowing

300
When subtracting a negative number from a positive, using counters, what needs to be added before the subtraction can be done?

Zero pairs to equal the second number. 

300

Solve the following problem : -13 - (-10 )= 

-3 

300

What is the difference between a word problem and a number sentence?

A word problem tells a story/ has word, a number entence only has numbers. 

300
Solve the following problem : 5.2 - 1.4 = 

3.8

300

Solve the following problem : 1,000 - 106 = 

895
400

Solve 13 - (-6) using Keep, Change, Change.

13 + + 6 = 19 

400

Why are base ten blocks called Base Ten?

Each block can be made of 10 of the next smallest blocks 

Ex: one flat can be made of 10 longs. 

400

Ms. AlJahne went to the store and purchased 22 pounds of turkey before dropping off 13 pounds to her mom.  How many pounds of turkey did she keep for herself?

9 pounds of turkey

400

Solve the following problem : 12 - 1.2 = 

10.8

400

Create and solve a word problem that matches the given number sentence :  1,200 - 365 = 

835.

500

Solve -15 - 6 using counters. 

-21

500

Solve 7 - (-8) using counters.

15

500

376 8th graders enrolled in Freire.  In the summer 18 of them decided to go to another.  25 students were sent to Positive Change during the school year because they were acting a fool.  How many 8th graders were attending Freire by the end of the school year. 

333 students 

500

Ms. AlJahne went online to Amazon and saw that her balance was $21.  She wanted to purchase a toy for Bash for $3.99.  What would her balance be after she purchased the toy?

$17.01

500

One person come to the board and explain how to solve the following problem:

200 - 32 =

168