Understanding Growth Rates and Multiplication

The video tutorial explains a word problem about hair growth, where a human hair grows 1.25 cm per month. The task is to calculate how long a strand of hair would grow in two years. The video breaks down the problem, identifies the units, and performs a step-by-step multiplication to find the answer. The final result is that a single strand of hair would grow 30 cm in two years.

What is the average growth rate of human hair per month as mentioned in the problem?

• 1.5 cm

• 0.75 cm

• 2.5 cm

• 1.25 cm

What is the first step in solving a word problem?

• Guess the answer

• Read and understand the problem

• Start calculating immediately

• Ignore the units

What is the main question the problem is asking us to solve?

• How long a strand of hair grows in one month

• The total number of hair strands on a human head

• How long a strand of hair grows in two years

• The average growth rate of hair per year

What is the importance of understanding units in a word problem?

• To make the calculation faster

• To make the problem harder

• To ensure the answer is in the correct form

• To ignore them

How many months are there in two years?

• 18 months

• 24 months

• 36 months

• 12 months

What operation is used to find the total hair growth over two years?

• Subtraction

• Addition

• Multiplication

• Division

What is the first step in the multiplication process described?

• Multiply 1.25 by 12

• Add 1.25 to 24

• Multiply 1.25 by 24

• Subtract 1.25 from 24

What is the result of multiplying 4 by 5 in the calculation?

• 15

• 30

• 20

• 25

What do you do after completing a place value in multiplication?

• Add a zero below

• Subtract one

• Divide by two

• Multiply by ten

What is the sum of the digits in the final column of the multiplication?

• 5

• 10

• 20

• 15