Step-4

Title: Counting the missing numbers

Grade: 2-a Lesson: S1-L4

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step Type Explanation Answer

1

Problem

Identify the missing numbers 256,252 _ _ 240 _.

2

Step

To find the missing numbers in the sequence 256, 252, _, _, 240, you can use the following method.

3

Step

The first number is

256

4

Step

The second number is

252

5

Step

The difference between 256 and 252 is

256 - 252 = 4

6

Step

The difference between 252 and the next number is also

4

7

Step

So the next number is

252 - 4 = 248

8

Step

The difference between 248 and the next number is also

4

9

Step

So the next number is

248 - 4 = 244

10

Step

The difference between 244 and 240 is also

244 - 240 = 4

11

Step

The difference between 240 and the next number is also

4

12

Step

So the next number is

240 - 4 = 236

13

Step

So the missing numbers are 248,244 and 236 and the complete sequence is 256,252,248,244,240,236.

14

Sumup

Can you summarize what you’ve understood in the above steps?

15

Choice.A

This is not correct because it has the numbers in the reverse order compared to the identified sequence

236,244,248

16

Choice.B

The first number, 235, doesn’t follow the pattern of subtracting 4 from the previous term. Therefore, option B is not correct

235,244,248

17

Choice.C

This is not correct because it doesn’t follow the consistent pattern of decreasing by 4. In this sequence, the second difference is not 4

236,244,249

18

Choice.D

This is correct because it follows the established pattern of decreasing by 4 in each step

248,244,236

19

Answer

Option

D

20

Sumup

Can you summarize what you’ve understood in the above steps?


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