Mathematical Expressions and Perimeter Problems

The video tutorial covers mathematical concepts for 6th-grade students, focusing on creating mathematical sentences using symbols, calculating areas and perimeters of various shapes, and solving practical problems involving counting and volume. The tutorial encourages students to engage with the material and provides examples to illustrate each concept. It concludes with motivational messages to inspire continued learning.

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If one cake costs 800, what is the total cost for buying 5 cakes?

• 4000

• 1600

• 800

• 3200

How do you express the relationship between the number of cakes and their total cost using symbols?

• 800 times box equals circle

• Circle times box equals 800

• Box plus circle equals 800

• 800 plus box equals circle

What is the area of a window that opens 10 cm wide if the height is 90 cm?

• 8100

• 1125

• 450

• 900

How would you write a mathematical expression to find the area of a window opened X cm wide?

• X plus 90

• 90 times X

• X minus 90

• 90 divided by X

What is the perimeter of a regular hexagon with each side measuring 6 cm?

• 36

• 18

• 48

• 30

How do you express the perimeter of a regular polygon with side length 'a'?

• 6 times a

• a plus 6

• a divided by 6

• 6 minus a

If there are 10 apples in each of the two boxes and 4 apples outside, what is the total number of apples?

• 20

• 24

• 30

• 14

How would you write a mathematical expression to find the total number of candies if there are X candies in each of the 4 boxes and 4 outside?

• X times 4 plus 4

• 4 times X minus 4

• 4 divided by X plus 4

• X plus 4 times 4

If each bottle contains 5 liters of juice and there are 3 bottles, plus 2 liters in a glass, what is the total amount of juice?

• 17 liters

• 15 liters

• 12 liters

• 20 liters