1. N1 .9 Demonstrate an understanding of addition of numbers
with answers to 20 and the corresponding subtraction facts,
c o n c r e t e l y, p i c t o r i a l l y, p h y s i c a l l y, a n d s y m b o l i c a l l y b y : us i n g
fam i l i ar m at h l an g ua g e t o d e s cr i be ad d i t i v e an d s u bt ra ct i ve act i o n s f ro m t he i r e x p e ri e n ce ; cre at i n g an d s o l vi n g
p r o bl e m s i n co n t e x t t hat i n v o l v e ad d i t i o n an d s ubt r act i o n ; mo d e l i n g a d d i t i o n an d s u bt ra ct i o n us i n g a v ari e t y o f co n cre t e
an d v i s u al r e p r e s e n t at i o n s an d r e co r d i n g t he p r o ce s s s y mbo l i c al l y .
In our classroom we have 12 boys and 8 girls.
How many students are there all together?
How many more boys than girls are there?
How many fewer girls are there than boys?