standard_description: Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (e.g., 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.
problem_activity: Problem 3
Pre-unit
Match the pictures with the expressions.
A:
[IMG]
B:
[IMG]
C:
[IMG]
1: \(\hspace{1.5cm}6+2\)
2: \(\hspace{1.5cm}5+3\)
3: \(\hspace{1.5cm}8-3\)


aligns: no