1. 1st Grade Mathematics Day 3, 4, and 5: Single Digit Addition and Grouping. Ms. Shragal’s Class
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4. Single Digit Addition We are going to try these simple addition problems as a class, using the tally mark system. Numbers 1 + 1= 2 I + I = II 1 + 2= 3 I + II = III 2 + 3 = 5 II + III = IIIII 3 + 5= 8 III + IIIII = IIIII III 5 + 4 = 9 IIIII+ IIII= IIIII IIII 5 + 5=10 IIIII+ IIIII= IIIII IIIII Words One+Two= Three Two+Three= Five Three+Five= Eight Five+Four= Nine One+One= Two Five+Five=Ten
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