Find the value of each expression mentally.

1. Here is how Clare and Andre represented  .

   

   

   1. How does each representation show ?
   2. How could you use Clare’s base-ten diagram to find the value of ?
   3. How could you use Andre’s area diagram to find the value of ?

2. Diego tried different ways to partition, or split, a diagram to help him find the value of .

   

   

   

   

   1. What do you notice about the numbers in his diagrams?
   2. Which diagram would you use to find the value of ? Explain your reasoning.
3. Find the value of . Show your thinking using diagrams, symbols, or other representations.

1. To find the value of , Mai started by writing this equation:

   Describe or show what Mai could do to finish finding the value of .

2. Find the value of each product. Show your reasoning.

Play Close to 100, Multiplication with a partner.

1. Place the cards facedown.
2. Each player draws 4 cards.
3. Each player chooses 2 cards to complete the factors in that round’s equation. The goal is to make a product as close to 100 as possible. Each player writes their 2 factors and their product.
4. The player whose product is closest to 100 wins the round.
5. Play 5 rounds. The player who wins the most rounds wins the game.

Game 1

Round 1

Round 2

Round 3

Round 4

Round 5

Game 2

Round 1

Round 2

Round 3

Round 4

Round 5