This Instructional Activity is part of the the Lesson 2, Unit 2, Grade 5. Or with the factors of the multiplication problem in either order? Why are parentheses necessary around the 26 and 4 in all of the expressions we wrote for Part (a)? How can that picture help you write a numerical expression? How can that picture help you write a numerical expression? Can we write expressions with the values of the subtraction expression in either order?