3 digit by 1 digit multiplication
What is 126 x 7?
882
What is 12 x 11?
132
Estimate 34 x 56 ?
30x60=1,800
What is 50 x 60? Explain your answer out loud.
50 x 60 is 3,000. First you solve 5x6 which is 30. Then you need to add the zeros from your factors, since there are 2, 30 with 2 more makes 3,000.
Mr. Smith is buying books for his class. Each book is $23. Books come in packages of 3. He buys 18 packages of books. How much does he spend on books?
23 x 3 = $69
69 x 18 = $1,242
What is 193 x 4?
772
What is 24 x 38?
912
Estimate 17 x 26?
20 x 30= 600
What is 8x 700? Explain your thinking.
8 x 7 = 56 so 8 x 700 = 5,600
Fungus ate 3 cookies everyday for 4 weeks and then ate 4 biscuits everyday for 6 weeks. How many treats did he eat in all?
3 x 28 = 84
4 x 42 = 168
84 + 168 = 252 treats
What is 259 x 3?
777
What is 43 x 52?
2,236
Estimate 32 x 29?
30 x 30= 900
what are the steps to solve 4 x 14. Choose a strategy and explain out loud.
area or partial products: solve 4x10= 40 and 4x4=16, add 40+16= 56.
Algorithm: 4x4 = 16, keep the 6 down carry 1 up, 4x1=4 +1 = 5
answer= 56
Ms. Fitz is buying pens. Each pen is $2. They come in packs of 7. She buys 1 pack for each of her 24 students. How much did Ms. Fitz spend?
2 x $7 = 14
14 x 24 = $336
What is 362 x 3?
1,086
What is 71 x 59?
4,189
Estimate 92 x 45?
90x50=4,500
What are the parts of a multiplication problem called?
4 x 5 = 20
Use this example to describe the parts (math vocab!)
4 x 5 - are the factors (#s you x together)
20- the product (answer to a x problem)
Mr. Gibson has $450. He is buying fraction circles for his class. Fraction Circles are $6 each and come in packages of 12. If he bought 5 packages, how much change should he get?
6 x 12 = 72
72 x 5 = 360
450 - 360 = $90
What is 272 x 7?
1,904
What is 35 x 24?
840
Estimate 77 x 34?
80 x 30= 2,400
What are the partial products for 17 x 6? Explain out loud.
10 x 6 = 60
7x6= 42
Ms. Fitz received $125 in change. The cashier only had $1s, $10s, and $100s. What are two ways she received change?
1 - $100, 2 - $10s, 5 - $1s
1 - $100, 25 - $1s
12 - $10s, 5 - $1s
1 - $100, 1 - $10, 15 - $1s