Math

Unit 5 - Data Management
Try these graphing activities to test your skill:  Data games for kids
Data Handling Games          Johnnie's Math Page Graph games    Ice Cream Graphing 

WE ARE LEARNING TO READ, INTERPRET,  AND DISPLAY DATA IN CHARTS AND GRAPHS SO THAT WE CAN COLLECT, ORGANIZE AND GRAPH OUR OWN DATA AND MAKE PREDCTIONS ABOUT DATA.

READ AND INTERPRET DATA IN TABLES

• Describe data from a table.
• Ask and answer questions about data in a table.

                      

                                  

READING PICTOGRAPHS AND BAR GRAPHS

• The title, labels, and axes tell you what data are displayed
• Pictograph - the key shows what each symbol represents
• Bar Graph - the scale shows how the length of a bar relates to the value it represent
• Range - the difference between the greatest value and the least value. 
• Mean - the middle number in a set of data (add up all the values and divide by the # of numbers added
• Mode - the number that appears most frequently

READING CIRCLE GRAPHS

A circle graph shows parts of a whole. 

                                            Grade 4 Students Favourite Sports           

                                                              

                                                                   

The favourite sport of Grade 4 students is Football because it is the largest sector.

DRAWING PICTOGRAPHS

• We use symbols and parts of symbols to represent data in pictographs.
• The key for a pictograph depends on the amount of data that will be shown in the pictograph.

Unit 2 - Whole Numbers

Here are some strategies we have learned to add whole numbers. Students are encouraged to use the one that they feel most comfortable with. 

Base 10 Addition 

-using blocks to represent numbers.
-represent both numbers with pictures 

-add the ones & re-group, add the tens & re-group, add the hundreds & re-group if needed

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Expanded Form Addition
 - Expand each number
 - Add each place value column
 - Add the expanded number together

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Place Value Addition

Click on the links below for some addition activities:

Pick a level, adding numbers from 100 - 1000!

Funschool adding games

Games for adding and subtracting

ESTIMATING SUMS

Estimate - an 'about' sort of number/a very smart guess

Sum - the answer to an addition question

We estimate sums so that we can check to see if our actual answers are reasonable.

One strategy we use is rounding to the nearest hundred or ten.

                                                            Ex. 480 + 390 = 

If we round these numbers they are about   500 + 400 = so the answer should be about 900

Try some of these games for practice!

Estimation Golf
Let's Go Shopping
Rounding and Estimating

Comparing and Ordering Numbers

We must remember that we can use a number line or, a place value chart to order numbers. Most important, pay special attention to the question. Does it say greatest to least or least to greatest? We are also reviewing the symbols that we can use to show whether numbers are greater or less than.
Check out these games for practice ordering numbers
Choose your scale
Caterpillar slide!
Many ordering games on one page
Ordering Numbers

The alligator reminds us that the symbol always opens to the larger number

• READ AND WRITE WHOLE NUMBERS IN STANDARD, EXPANDED, AND WORD FORMS

Standard Form: 1247

Expanded Form: 1000 + 200 + 40 + 7

Word Form: One thousand two hundred forty-seven

• ROUND NUMBERS TO THE NEAREST TEN, HUNDRED, AND THOUSAND

Rounding Numbers (Click here to watch the 'Round me Maybe' music video)

4 Steps To Rounding

1.  Circle the digit in the position you want to round to.

2.  Underline the digit to the right of the circled digit.

3.  If the underlined digit is 4 or less - let it rest! (do not change it). If the underlined digit is 5 or above - give it a shove (increase the circled digit by 1).

4.  Change all the digits to the right of the circled digit to zeros.

Which One Rounds?

SEPTEMBER

WE ARE LEARNING TO IDENTIFY, EXTEND AND CREATE PATTERNS USING PATTERN RULES, SO THAT WE CAN RECOGNIZE AND APPLY THEM WHEN SOLVING PROBLEMS.

• USE CHARTS TO DISPLAY PATTERNS AND IDENTIFY THE PATTERN RULE

Number Pattern
2, 5, 8, 11, 14, 17, 20, 23, 26, 29 

Rule:

Start at 2. Count on by 3.

Position Pattern
starting at 2 every 3rd square is coloured
Rule:

Use 2 as the start diagonal.

The coloured squares lie along every third diagonal

The diagonals go 1 down, 1 left

• IDENTIFY AND EXTEND NUMBERS PATTERNS

Repeating

5, 1, 2, 5, 1, 2

Rule: Repeat the core: 5, 1, 2

Growing  
3, 6, 9, 12, 15
Rule: Start at 3. Add 3 each time.

1, 2, 4, 8, 16
Rule: Start at 1. Multiply by 2 each time.

2, 4, 8, 14, 22, 32
Rule: Start at 2. Add 2. Increase the number you add by 2 each time.

Shrinking
25, 21, 17, 13, 9
Rule: Start at 25. Subtract 4 each time.