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 1
Solve. Show or explain your work.
a.
$${91\div20}$$
b.
$${368\div50}$$
Problem 2
Use multiplication to check your answers to both problems in Problem 1.


aligns: no