This Warm-up prompts students to carefully analyze and compare features of expressions. In making comparisons, students have a reason to use language precisely. The activity also enables the teacher to gain insight into students’ understanding of properties of operations and how they talk about them. This activity prepares students to reason flexibly and to use multiple strategies (including writing different expressions) to solve word problems later in the lesson.
Which 3 go together?
A
5×90
B
90+90+90+90+90
C
(4×90)+(1×90)
D
3×3×10×5
Sample responses:
A, B, and C go together because:
A, B, and D go together because:
A, C, and D go together because:
B, C, and D go together because:
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This Warm-up prompts students to carefully analyze and compare features of expressions. In making comparisons, students have a reason to use language precisely. The activity also enables the teacher to gain insight into students’ understanding of properties of operations and how they talk about them. This activity prepares students to reason flexibly and to use multiple strategies (including writing different expressions) to solve word problems later in the lesson.
Which 3 go together?
A
5×90
B
90+90+90+90+90
C
(4×90)+(1×90)
D
3×3×10×5
Sample responses:
A, B, and C go together because:
A, B, and D go together because:
A, C, and D go together because:
B, C, and D go together because: