Math Message: 1) Make Ballpark Estimations for 56 + 79 56 + 79 891 + 213 891 + 213 2) Play Estimation Tic-Tac-Toe with someone at your table.

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Presentation transcript:

Math Message: 1) Make Ballpark Estimations for ) Play Estimation Tic-Tac-Toe with someone at your table

Column-Addition Method SRB page 11

Column Addition Method 1. Draw lines to separate the 1’s, 10’s and 100’s places 2. Add the numbers in each column. Write each sum in its column 3. If there are 2-digits in the 1’s place, trade 10 ones for 1 ten 4. If there are 2 digits in the 10’s place, trade 10 tens for 1 hundred

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1 ) Math Journal pages ) Play Tic-Tac-Toe Addition 3) Math Boxes