Large domino cards can be
used to help students learn how to generate the two addition
and subtraction stories for a pair of numbers. The teacher
can use the cards with a small group or with the whole
class. The cards can also be used in a center. Students
select a card and write the 4 addition and subtraction
problems on paper or a chalkboard or they can simply "chant"
the addition and subtraction problems.
The teacher can easily demonstrate
the commutative property of addition by flipping the card
around. Students learn quickly that 1 + 4 is the same
as 4+1. If you fold the card in half, it is easy to demonstrate
the subtraction problems that can be generated. Show the
whole card. Say, "5 altogether take away 1 ( fold
1 star back) equals 4." Start with the whole card
again. Say, " 5 altogether take away 4 (fold 4 stars
back) equals 1.
1 + 4 = 5 5
- 1 = 4
4 + 1 = 5 5
- 4 = 1
Use the dominoes
to help students quickly identify sums. Flash a star domino
to the class. Students must quickly determine how many stars
were on the card. Ask to students to share how they knew
how many there were so quickly. You should hear responses
like, " I saw a 4 and a 1. I knew 4 and 1 more is 5."
" I saw 3 and 3. It's a double. 3 plus 3 equals 6."
Students can sort
the cards to the appropriate number family to help reinforce
the star dominoes for number families 5 through 10 in PDF