Addition and Subtraction Concepts 99
Rigorous Problem Solving with the Concept of
Near Tens for Addition and Subtraction 1
The students at Blaise Elementary School shop in the school
store. Below is a chart of the sales during the fi rst week.
Item Started with Sold How many left
Gel pens 56 39
Erasers 83 59
Notebooks 34 29
Part A
Which equation uses a place value strategy to represent how
many gel pens are left in the school store?
o 56 – 39 = 56 – 30 + 1
o 56 – 39 = 56 – 30 – 1
o 56 – 39 = 56 – 40 + 1
o 56 – 39 = 56 – 40 – 1
o 56 – 39 = 56 – 50 + 1
Part B
Use a place value strategy to represent how many erasers and
notebooks are left in the school store.
Erasers Notebooks
© 2016, Math Intervention: Grades 3–5, Jennifer Taylor-Cox, Routledge