Understanding Subtraction in Real-Life Contexts

The video tutorial explains how to determine the amount of snow that fell on Friday in Chillytown after a snowstorm on Thursday. Initially, the snow depth was 55 cm, and it increased to 84 cm by Friday. The tutorial uses a diagram to visualize the problem and sets up a mathematical equation to find the difference in snow depth. By solving the equation, it is determined that 29 cm of snow fell on Friday. The tutorial emphasizes understanding the story, using diagrams, and writing equations to solve such problems.

What was the depth of the snow in Chillytown after Thursday's storm?

• 75 cm

• 55 cm

• 45 cm

• 65 cm

Tags

CCSS.7.EE.B.3

By Friday, what was the new depth of the snow in Chillytown?

• 74 cm

• 84 cm

• 94 cm

• 104 cm

Tags

CCSS.7.EE.B.3

What is the main question we are trying to solve regarding the snowfall?

• How many centimeters of snow fell on Friday?

• How much snow melted on Friday?

• How much snow fell on Thursday?

• What was the temperature on Friday?

Tags

CCSS.2.OA.C.4

Which mathematical operation helps us find out how much snow fell on Friday?

• Division

• Addition

• Subtraction

• Multiplication

Tags

CCSS.2.MD.B.5

What is the difference between 84 cm and 55 cm?

• 49 cm

• 19 cm

• 29 cm

• 39 cm

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What is the first step in solving the subtraction problem 84 - 55?

• Multiply the numbers

• Regroup the tens

• Subtract directly

• Add 10 to the ones place

Tags

CCSS.2.NBT.B.7

After regrouping, what is 14 ones minus 5 ones?

• 8 ones

• 7 ones

• 10 ones

• 9 ones

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What is the final result of the subtraction 84 - 55?

• 19

• 29

• 39

• 49

Tags

CCSS.2.NBT.B.5

How can you verify that 55 plus 29 equals 84?

• By multiplying 55 by 29

• By adding 55 and 29

• By subtracting 29 from 84

• By dividing 84 by 29

Tags

CCSS.1.OA.A.1

What is a helpful strategy for solving problems like this?

• Visualize the problem and use equations

• Use only mental math

• Ignore the story

• Guess the answer

Tags

CCSS.1.OA.A.1