Comparative Weight and Time Problems

In this lesson, Caitlin guides students through solving a series of math problems. The first problem involves determining the original number of markers in a box after distributing some to teachers. Caitlin explains the reasoning process and uses equations to represent the problem. The lesson continues with matching expressions to story elements and concludes with matching equations to different scenarios. The video emphasizes understanding mathematical reasoning and equation representation.

How many markers were originally in each large box if 15 markers were given to each of three teachers and 90 markers remained?

• 75

• 60

• 45

• 30

In the equation 25 = 2 + 6x, what does the '6' represent in the context of the diagram?

• Six x's

• Six markers

• Six teachers

• Six groups

If Jada walked for 90 minutes, how much longer did she walk compared to Elena?

• Same time

• 30 minutes more

• 20 minutes more

• Twice as long

What expression represents Elena's walking time if she walked 20 minutes more than Lynn?

• x + 20

• x

• 2x

• x - 20

In the story about the travel bag, what is the total weight of the bag and books?

• 20 pounds

• 25 pounds

• 17 pounds

• 15 pounds

How many identical rectangles are there in the scenery for the school play?

• Two

• Five

• Three

• Four

What is the total length of the three identical rectangles in the school play scenery?

• 25

• 20

• 17

• 15

How much does each book weigh if the total weight of the bag and books is 17 pounds and the bag alone weighs 3 pounds?

• 3 pounds

• 2 pounds

• 4 pounds

• 5 pounds

In the story about Noah, how many bags does he pack?

• Four

• Three

• Five

• Six

What is the total weight of the bags Noah packs if each bag contains 3 pounds of groceries and a packet of papers?

• 25 pounds

• 15 pounds

• 17 pounds

• 20 pounds