Arrays
Draw an array to represent 3 x 12. How many total squares are there?
36. Draw 3 rows of 12 squares.
Use an area model to solve 2 × 14.
20 + 8 = 28
Use partial products to solve 13 × 2.
(10×2)+(3×2)=20+6=26.
A class orders 3 pizzas. Each pizza is cut into 14 slices. How many pizza slices are there altogether?
3 × 14 = 42 slices.
True or False? 18 × 4 = 62 If it's false, find the correct answer.
False! 18 × 4 = 72.
Draw an array for 4 x 16. What is the product?
64. Four rows of 16.
Draw an area model for 16 × 3 and find the product. Label both sections.
10×3=30 and 6×3=18. Total 48.
Solve 24 × 3 using partial products.
60 + 12 = 72.
Nagham has 5 pages of stickers in her collection. Each page has 26 stickers. How many stickers does Nagham have in total?
5 × 26 = 130 stickers.
Complete the equation: ___ × 6 = 144 What number is missing?
24
Use an array to show 12 × 13. Break both numbers apart.
(10×10)+(10×3)+(2×10)+(2×3)=156.
Use an area model to solve 12 × 14.
100 + 40 + 20 + 8 = 168.
Solve 13 × 12 using four partial products.
100 + 20 + 30 + 6 = 156.
An aquarium has 13 fish tanks. Each tank has 12 colorful fish. How many fish are there altogether?
13 × 12 = 156 fish.
A student solved 23 × 12: 20 × 10 = 200 20 × 2 = 40 3 × 10 = 30 3 × 2 = 6
Final answer = 266. What mistake did the student make?
The student added incorrectly. The answer is 276. 200 + 40 + 30 + 6 = 276.
Draw an array for 23 × 14. Label its four sections.
200 + 80 + 30 + 12 = 322.
Draw and label all four sections of an area model for 24 × 16, then solve.
200 + 120 + 40 + 24 = 384.
Solve 26 × 14 using partial products.
200 + 80 + 60 + 24 = 364.
In a video game, a player earns 24 coins every time they complete a level. They complete 16 levels. How many coins did the player earn altogether?
24 × 16 = 384 coins.
I'm thinking of two numbers. Both numbers have 2 digits. One number is 3 more than 20. The other number is double 7. What are my numbers, and what is their product?
23 and 14. Their product is 322.
A student says 24 × 13 = 282. Draw an array to find and explain the mistake.
Correct answer: 312. 20×10=200, 20×3=60, 4×10=40, 4×3=12.
An area model has sides 32 and 25. Find each section and the total.
600 + 150 + 40 + 10 = 800.
Find the mistake: 32 × 15 = 150 + 10 + 60 + 10 = 230.
The 30×10 partial product should be 300, not 150. Correct sum: 300+150+20+10=480.
At a school carnival, 18 classes each sell 25 tickets. Every ticket costs $3. How much money do all the classes raise altogether?
18 × 25 = 450 tickets. Then 450 × 3 = $1,350. $1,350.
I'm thinking of a multiplication problem. Its four partial products are: 300 + 120 + 50 + 20 What two numbers were multiplied? What is the final product?
35 × 14 = 490.