Multiples of 10
Solve
20 X 12
240
Estimate each product
44 X 13 =
__ X __ = __
40 X 10 = 400
A bus has 14 rows of seats. Each row can seat 4 students. How many students can be seated all together?
14 X 4 = 56
Use the area model to solve:
16 X 27
When rounding, you will always round to the _____
Highest place value
Solve
20 X 35
700
Estimate the product
42 X 17 =
__ X __ =
40 X 20 = 800
Ken uses 6 apples and 2 bananas to make a fruit salad. He puts twice as many oranges as bananas in the salad. How many pieces of fruit will Ken put into his fruit salad?
6 apples + 2 bananas + 4 oranges = 12 pieces of fruit
Use the area model to solve:
22 X 88
1,936
What are the TWO methods I have taught you specifically for 2-digit by 2-digit multiplication?
Area model & expanded algorithm
Solve
29 X 30
870
Estimate each product
74 X 34 =
__ X __ =
70 X 30 = 2,100
Keisha sold 8 ribbons and 6 pins at a craft fair. She sold the ribbons for $3 each and the pins for $2 each. How much money did Keisha earn all together?
8 X $3 = $24
6 X $2 = $12
12 + 24 = $36
Keisha earned $36 all together
Use expanded algorithm to solve
73 X 47
3,431
There are 52 weeks in 1 year. How many weeks are there in 4 years?
208 weeks
Solve
70 X 80
5,600
Estimate the product
82 X 36 =
__ X __ = __
80 X 40 = 3,200
Tonya buys 16 tomato plants and 8 cucumber plants to plant in her vegetable garden. She plans to plant 4 vegetable plants in each row. How many rows will Tonya have?
16 + 8 = 24
24 / 4 = 6 rows
Use expanded algorithm to solve
82 X 80
6,560
On average, a cat sleeps 16 hours a day. How many hours does a cat sleep in 4 weeks?
28 X 16 = 448 hours
Solve
90 X 60
5,400
Estimate the product
57 X 49=
__ X __ = __
60 X 50 = 3,000
Rosa got lunch at Chic fil a with her friend. She ordered a chicken sandwich, 2 mac n cheese, fries, and a drink. The chicken sandwich was $8, 1 mac n cheese costs $4, fries are $2, and the drink was $3. Her total came to exactly $25, so how much did she pay for tax?
8 + 4 +4 +2 +3= 21
25-21= 4
Rosa paid $4 for tax
Use ANY method to solve
67 X 49
3,283
Which answer choice is NOT a partial product?
32 X 17
a. 20
b. 14
c. 30
d.210
c