Math Message:
1) Make Ballpark Estimations for
56 + 79
891 + 213
2) 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
Column-Addition Method
1. 327
+ 252
579
Check Your Understanding
1
2. 67
+ 45
112
Addition Games
Ghost Blasters
2-Digit
3-Digits
1)
Math Journal pages 42-43
2) Play Tic-Tac-Toe Addition
3) Math Boxes 2.4-2.7