Addition with Regrouping
-Start by adding your ones column (right column)
37
+ 27
4
-If the sum is over 9, regroup your 1ten at the top ofthe tens column.Write your ones place in the ones column.
1
37
+ 27
4
-Add the tens column (left column). Write your answer in the tens place.
1
37
+ 27
6 4
You have solved the problem!
Subtraction with Regrouping
-Start by subtracting your ones column (right column)
94There are not enough ones to subtract.
- 68There are more on the floor, so you go next door to get 10 more!
-You have to mark out the top row of tens to make it one less and mark out the ones to make it 10 more.
8 14
94
- 68
-Now you can subtract the ones column!
8 14
94
- 68
6
-Now you can subtract the tens column!
8 14
94
- 68
26You have solved the problem!
Word Problem Strategies - Subtraction
Read the problem
There are 54 shells in my collection. Sixteen shells are broken. How many shells are not broken?
Circle your numbers with labels, underline the question, box the important solving words
There are 54 shells in my collection. Sixteen shells are broken. How many shells are not broken?
Draw a picture/work out the algorithm
4 14
54
-16
3 8
Word Problem Strategies - Addition
Read the problem
There are 19 students in Mrs. Ragsdale’s class and 19 students in Mrs. Walker’s class. How many students are in both classes?
Circle your numbers with labels, underline the question, box the important solving words
There are 19 students in Mrs. Ragsdale’s class and 19 students in Mrs. Walker’s class. How many students are in both classes?
Draw a picture / work out the algorithm
1
19
+ 19
3 8
Word Problem Strategies - Division
Read the problem
There are 5 children sharing 15 cookies. How many cookies does each child get?
Circle your numbers with labels, underline the question, and box the important solving words
There are 5 children sharing 15 cookies. How many cookies does each child get?
Draw a picture. Remember to divvy out the cookies to each box. You are trying to find a smaller number when you are doing division.
3 33 3 3
Word Problem Strategies - Multiplication
Read the problem
There are 4 boxes. If we put 2 books in each box, how many books will there be?
Circle your numbers with labels, underline the question, and box the important solving words
There are 4 boxes. If we put 2 books in each box, how many books will there be?
Draw a picture.Remember to put the correct amount of circles in each box and add them together. You are looking for a larger number with multiplication.
2+ 2 + 2 + 2= 8
Coin Counting Strategies
Label the coins with theiramounts or count up. (Whichever works best for you)
2510 5 1
or
25 35 40 41
Add the amounts together.
25 + 10 = 35 + 5 = 40 +1 = 41Total: 41 cents
Multiple Representation Chart
Place ValuePictorial
H T O
1 1 1
ExpandedWritten
100+10+1One hundred eleven
Counting in Patterns (Skip Counting)
Look at the pattern. See if you are increasing or decreasing from left to right. The increasing or decreasing amount will not change.
+ 5 + 5
5, 10, ____, 20, 25, ____, ____, 40, ____, ____, 55(adding 5 in each blank)
Once you have the pattern, fill in the numbers.
5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 (notice the ones place ends 5, 0, 5, 0, etc.)
Check your work by recounting all the numbers.
Fact Families for Addition/Subtraction
Look at the three numbers given. Example: (7, 5, 2)
Ask yourself, how can I use these 3 numbers to make 4 number sentences?
Remember you need 2 addition sentences and 2 subtraction sentences.
The addition sentences endwith the largest number.
5 + 2 = 7
2 + 5 = 7
The subtraction sentences begin with the largest number.
7 – 5 = 2
7– 2 = 5
2D Polygons
They are flat, have at least 3 straightsides, and are closed.
side
vertices(Point at which each side meets)
3D Shapes
They are not flat. Most3D shapes have faces, edges, and vertices. Some 3D shapes that have curved surfaces will not have edges, faces, or vertices.
Vertices
Face
Edge
If you see these words/phrases in a word problem, circle them, they will give you clues so you know whether you need to add or subtract your numbers!!
Key words for addition Word Problems:
totalsumincreasebothaltogether
combinedaddplusin all together
Key Words for Subtraction Word Problems:
less than fewer thanhow much more
decreaseremainsminus
differencefewerhow many more
take awayhow many lesshow many fewer
1