2. Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
Alignment of the Resource to this Standard
IOER Community Rating: Not Rated
5. Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
Alignment of the Resource to this Standard
IOER Community Rating: Not Rated