operations
sum
add +
even
E: 0, 2, 4, 6, 8
3, 456
standard form or S.F.
3,000 + 400 + 50 + 6
expanded form or E.F.
difference
subtract -
odd
O: 1, 3, 5, 7, 9
three thousand four hundred fifty-six
word form or W.F.
associative property
a.p. = friends
product
multiply x
strategies for multiplying
array, skip counting, equal groups, repeated addition
ascending
L --> G
array
R x C
quotient
divide รท
descending
G --> L
distributive property
d.p. = k1 b1
commutative property
c.p. = flip factors