Slide 1

Mondays MathFebruary 21st, 2011

Addition: Two and Three Digits

When doing an addition problem, always:

Place the numbers so the ones places are in a straight line.

Add each column, starting on the right and working to the left.

If the sum is greater than 9, carry the one to the next column on the left. (Regrouping)

Remember your math tricks for faster speed and accuracy!Practice addition, use dice on mimio 2

Math Tricks

This week we will have new math tricks. Listen for your name to see which math trick you will be working on to improve your speed and accuracy.

Take the pre-test on your problems. We will be working on these throughout the week!

Call out names and have practice problems ready.3

Math Tricks

Call out names and have practice problems ready.4

Subtraction of Whole Numbers

Using your math trick groups from last week, practice subtracting.

Subtraction is the opposite of addition, so you will be able to remember your numbers better than you think!

For example,

2 Ladder Group: 2+6=8 SO 8-6=2 and 8-2=6

You practice: Solve these review problems, then using the digits in the addition problem and solution, write two subtraction facts.

Given review from last week, write the matching subtraction facts given the addition problem and solution.5