Missing Dimensions
Find the unknown dimension of a rectangle with a perimeter of 254 meters with one dimension that measures 6 meters.
6+6=12
254-12=242
242/2=121
121 meters
True or False?
61/5=1 2R1
True
Fill in the blank to make the equations true.
104x5=___x10
52
104x5=52x10
Doubling and Halving
Find the unknown dimension of a rectangle if the area is 216 square ft and one dimension is 6ft.
216/6
36ft
True or False?
19x37=(20x37)-1
False
Fill in the blank to make the equations true.
99x79=(____x79)-(1x79)
100
(100x79)-(1x79)
Eight friends are going skiing. They are paying a group rate of $264. How much does each friend need to pay?
$264 ÷ 8 = (240 ÷ 8) + (24 ÷ 8) =
30 + 3 = $33
Each friend will pay $33
The perimeter of a rectangle is 846 centimeters. One dimension is 134 centimeters. What is the length of the other dimension?
Multiply 2 times 134, which is 268.
846-268=578
Divide 578 by 2
578=(500+70+8)
(500/2=250)+ (70/2=35)+ (8/2=4)
289cm
True or False?
32x24=64x12
True
Doubling and Halving Strategy
Fill in the blank to make the equations true.
42x5=21x_____
10
42x5=21x10
Doubling and Halving
The fourth graders are setting up the playground for field day. One of the parents brings 74 balloons to decorate the tables.
If the fourth graders divide the balloons evenly among 8 tables, how many balloons will each table get?
74 ÷ 8 = 9 R2
9 balloons with two left over
The area of a path is 8,024 square feet. One dimension is 8ft, what is the length of the other dimension?
8,024/8=(8,000/8)+(24/8)=1000+3=1003
1003 feet
True or False?
49x73=(40x70)+(9x3)
False
49x73=3577
(40x70)+(9x3)=2827
Fill in the blank to make the equations true.
57x29=(50x29)+(____x29)
7
(50x29)+(7x29)
The scouts are collecting canned food to donate to the food bank. Their goal is to collect 550 cans of food. By the end of the first hour, they had collected 13 bags with 16 cans of food in each bag. By the end of the second hour, they had collected 12 more bags with 15 cans of food in each bag. How many more cans of food do they need to collect to meet their goal of 550?
(13 × 16) + (12 × 15) = 208 + 180 = 388 collected so far.
Goal of 550 – 388 collected = 562 – 400 = 162 yet to collect.