54 Addition and Subtraction Concepts
Rigorous Problem Solving with the Concept of
Missing Part Subtraction 2
Donald has 20 pennies. He leaves some on the table and
hides some in his hand.
Complete the chart to represent how many pennies are on
the table, how many are hiding in his hand, and the related
subtraction equations. Note: Donald does not hide or leave zero
pennies on the table.Part ATotal Pennies On the Table Hiding in
Donald’s handSubtraction
Equation
20 15 20 – 15 = 5
20 10
13 7
20 17
20 12
614
20 19Part B
Write subtraction equations to represent three other ways
Donald could hide part of the 20 pennies.© 2016, Math Intervention: Grades 3–5, Jennifer Taylor-Cox, Routledge