Counters and Basic Addition Problems

The video tutorial explains how to find a missing number in a math problem using counters. The problem is to determine what number, when added to 12 + 3, equals 19. The teacher uses counters to visualize the numbers, first adding 12 and 3 to get 15, then counting up to 19 to find that 4 is the missing number. This method helps students understand addition and the concept of missing numbers in equations.

What is the initial number of counters used to represent the first part of the equation?

• 12

• 19

• 10

• 15

After adding 3 more counters, what is the total number of counters?

• 19

• 18

• 15

• 12

How many more counters need to be added to reach the total of 19?

• 2

• 3

• 4

• 5

What is the missing number in the equation 12 + 3 + blank = 19?

• 2

• 3

• 5

• 4

What is the final total number of counters when the equation is balanced?

• 15

• 16

• 18

• 19