7-1 Arrays & Multiplying 2-Digit Numbers by Multiples of 10

7-1 Arrays & Multiplying 2-Digit Numbers by Multiples of 10

How can arrays help you multiply a 2-digit number by a multiple of 10?

Draw an array or a box on your think paper to help you solve each problem.

Multiple Choice

17 ✕ 100 = __________

• 170
• 17,000
• 1,700
• 17

Multiple Choice

• 40

• 400

• 4,000

• 40,000

Multiple Choice

65 x 20

• 1300

• 130

• 1400

• 1030

Multiple Choice

It takes 40 gallons of water to do a load of wash. How many gallons of water does it take to do 15 loads of wash? Draw an array on your whiteboard to help you solve this problem.

• 400

• 415

• 600

• 900

Multiple Choice

Henry used place-value blocks to model 20 x 17. How many blocks did he use in his model in all? Draw an array on your whiteboard to help you solve this problem.

• 34

• 37

• 340

• 370

Poll

Time for a level check!

How do you feel about the lesson today?

• Level 0

  Are you sure you weren't speaking in Ancient Greek or something?

• Level 1

  I'm starting to get parts of it but I'm still really confused.

• Level 2

  I get it, as long as I have an example in front of me.

• Level 3

  I get it and I can show my work, but I'm not ready to take over the class and teach it yet.

• Level 4

  I get it AND I could teach it! So move over Mrs. N... I got this!