Multiply by multiples of 10
10 x 40
400
1,500 + 250
Estimate: 12 x 18
10 x 20 = 200
14 x 32 =
448
312 seats
40 x 60
2,400
What are the partial products for 10 x 23?
200 + 30
70 x 20 = 1,400
56 x 17 =
952
The dimensions of my new garden are 15 feet long by 18 feet wide. How big is my garden?
270 square feet
50 x 70
3,500
What are the partial product for 16 x 20?
200 + 120
Estimate: 68 x 43
70 x 40 = 2,800
72 x 15 =
1,080
There are 74 regular players on a NFL team. If there are 32 teams, how many professional football players are there?
There are 2,368 NFL players.
90 x 90
8,100
What are the partial products for 14 x 12? What is the final product?
100 + 20 + 40 + 8 = 168
Estimate: 89 x 81
90 x 80 = 7,200
84 x 37 =
3,108
Tom earned $25 each week for delivering papers, and $67 each week for delivering pizzas. How much money will Tom save after 12 weeks?
Tom will save $1,104 in 12 weeks.
80 x 80
6,400
What are the partial products for 86 x 91? What is the final product?
6 + 80 + 540 + 7,200 = 7,826
Estimate: 94 x 32
90 x 30 = 2,700
46 x 26 =
1,196
A hometown soccer league has 18 teams of 24 players. How many total players are there? What are the partial products? Is your answer reasonable?
18 x 24 =
32 + 160 + 40 + 200 = 432 players
20 x 20 = 400
Yes, my answer is reasonable because 400 and 432 are very close. (Only 32 away)