Week 28MondayMeet the × Sign

1Warm-up: Add Equal Groups

2-min Fluency Warm-up — Add the equal groups in your head.

4 + 4 =

3 + 3 + 3 =

5 + 5 =

2 + 2 + 2 + 2 =

2The × Sign Means Groups Of

The × sign means "groups of." 3 × 4 means "3 groups of 4" — the same as 4 + 4 + 4!

4 + 4 + 4 = 12

3 × 4 = 12

Say it: "3 groups of 4"

5 + 5 = 10

2 × 5 = 10

Say it: "2 groups of 5"

3Match: Addition to Multiplication

Write the multiplication sentence that matches. The first number is HOW MANY groups.

3 + 3 + 3 + 3 = 12

× =

6 + 6 = 12

× =

2 + 2 + 2 = 6

× =

5 + 5 + 5 = 15

× =

4Number Talk: What Does × Mean?

Number Talk — Explain WITHOUT calculating.

Ben says 4 × 2 means "4 + 2."

Is Ben right? What does 4 × 2 REALLY mean?

My thinking:

Which is bigger: 5 × 2 or 5 + 2?

How do you know?

My thinking:

5Challenge: Show Two Different Ways

Challenge — Show 4 × 3 in two different ways: as repeated addition AND as a drawing (groups or an array).

Way 1 (repeated addition):

Way 2 (drawing):

4 × 3 =