3rd Grade Math
Math.pngNumber Sense:  Understanding what a number is and how to use it by itself and with other numbers in a variety of situations.

Continue to practice number sense by doing the following...
1.  comparing numbers up to the thousands.  For a challenge, compare numbers up to the millions, billions, and trillions.

2.  Put numbers in order from greatest to least and least to greatest.  Start with numbers in the 10's, then 100's, and 1,000's.  For a challenge add in numbers that are in the millions, billions, and trillions.

3.  Practice writing the names of the numbers from 0-9,999.  For a challenge, write numbers in the millions, billions, and trillions.

4.  Practice writing numbers in expanded form.  What makes up the number 13? 542? 6,497? 
* 13= 10 + 3     542= 500 + 40 + 2     6,497= 6,000 + 400 + 90 + 7

5.  Draw pictures using tally marks or place value blocks for numbers up to 9,999.

6.  Memorize your place value chart up to the millions, billions, and trillions.  This will give you a jump start to 4th Grade.

7.  Rounding numbers to the nearest 10's and 100's.  Prove you are correct by putting it on a number line.   Remember the rule:  If the number ends in 0-4 it is closer to the number to the left (moving down to the previous tens).  If the number ends in 5-9 it is closer to the number on the right (going up to the next tens).   

Math symbols clip artMath Computation: Being able to solve addition, subtraction, multiplication, and division problems while using story problems, number lines, pictures, tally marks, traditional algorithms, place value blocks, bar diagram, or ration tables.

1.  Know your basic facts when adding, subtracting, multiplying, dividing.  Many practice with flash cards to become fluent.

2.  Always check your work with a different  method such as place value blocks, number lines, or bar diagrams.  You can also check your addition problem by subtractions and your multiplication problems by division (and visa versa).

3.  Practice teaching others how to use line models, place value blocks, bar diagrams using math vocabulary.

4.  When correcting errors, be ready to explain why it was wrong using math vocabulary.

5.  Be ready for math talks.  It is important to use your math vocabulary to help others understand the way you are using numbers.

* 3rd Grade addition problem (no regrouping and regrouping... use to be called carrying):  9,999 + 3,455=

* 3rd Grade subtraction problem (no regrouping and regrouping... use to be called borrowing): 8,742- 3,599=

* 3rd Grade multiplication: 3 x 4=          22 x 8=          21 x 31=
                                             12x10=        12x100=       12x1000=

* Challenge:  Adding and Subtracting in the millions, billions, and trillions.
* Challenge:  Multiplying and dividing larger numbers.