Question

Count by 10s, and fill the missing numbers in the balloons.

• A. $20,30,45,50$
• B. $20,30,40,50$
• C. $20,25,45,50$
• D. $12,13,14,15$

Answer 1

The correct option is B $20,30,40,50$

Say: Skip counting helps you to count groups of objects faster.
Let us skip count by 10 and complete the pattern.

Steps:
$\bullet$ As we can see in the given image, there are 6 balloons, and we have to skip count by 10s to fill in the missing numbers.
$\bullet$ The first balloon has 10 written on it.
$\bullet$ The second balloon will have 10 + 10 = 20 written on it.
$\bullet$ The third balloon will have 20 + 10 = 30 written on it.
$\bullet$ Similarly, the fourth balloon will have 40 and the fifth balloon will have 50 written.
$\bullet$ The sixth balloon has 60 written on it.
$\bullet$ We can see that the numbers are arranged in increasing order because we are adding the same number to each number to get the next number.
$\bullet$ The sequence is 10, 20, 30, 40, 50, 60.
$\bullet$ Hence, option B is the correct answer.

WB: If required, use the whiteboard to draw balloons and skip count by 10s to find the missing numbers as shown.


Probing Question:
Q: If three more balloons are added, what numbers would be written on them?
A: $70,80,90.$