3.1.1 - properties of addition

Cuisenaire rods
1) Model with the rods
G + R =[br][br]W + Y =[br][br]P + Y =
2) If the sum exceeds Orange, use O + ______, where the excess color goes in the blank. Model with rods. Write just the letter.
K + E =[br][br]N + D =[br][br]K + K =
Model & answer # 3 in activity manual. What relationship do you notice?
5 c) Model with the rods
(P + R) + G =[br][br]P + (R + G) =[br][br]What do you notice?
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Information: 3.1.1 - properties of addition