Double Digits
18 x 30
540
Estimate 213 x 32
6,000
Lewis and Clark each received 1,600 acres of land after their expedition. The other 31 enlisted men from the expedition each received 320 acres of land. How many total acres of land were awarded?
13,120
Find the missing value for the following: 34 x 27
30 x 20=
30 x ?=
4 x 20=
4 x 7 =
? = 7
Estimate: 25 x 74
2,100
475 x 18
8,550
In Florida, a wind turbine must be 660 feet tall to be efficient. A turbine has a base that is 25 feet wide. The total height of the turbine is 13 times taller than the width of the base. Is the turbine efficient?
No
Find the missing value for the following: 34 x 27
30 x ?=
30 x 7 =
4 x 20=
4 x 7 =
? = 20
62 x 34
2,108
684 x 27
18, 468
A Ferris wheel runs 40 times each day. It has 16 cars with 4 seats in each car. If the Ferris wheel is full each time it runs, how many people will ride it in 1 day?
2,560
Error Analysis:
Estimate 23 x 47
= 800
Why is the product above incorrect?
The 47 should have been rounded up to 50.
73 x 45
3,285
297 x 92
27, 324
A fan memorizes 59 songs for a music festival. Her goal is to memorize all the songs from 13 albums. There are 12 songs on each album. How many more songs does the fan need to memorize?
97
You would like to paint a wall. You must not paint the window on the wall. If the wall is 10ft wide and 14 ft long and the window is 4ft long by 2ft wide, what is the area that you will paint?
Formula: Area = L x W
132
15 x 67
1,005
554 x 83
45,982
Find the area of the Jamaican flag.
Area = L x W
36 36
_______l________
36
________________
L= 36 +36= 72
W= 36
72 x 36= 2,592
A park director orders 360 feet of fencing. Does he have enough to surround the tennis court?
Court has 40yd length and 20 yd wide.
Yes because fencing will require using the perimeter formula: L+L+W+W