Step-5

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 283,280 _ _ 271 _ 265 _ 259 _ 253 _.

2

Step

To find the missing numbers in the sequence 283,280,,,271,,265,,259,,253,, you can use the following method.

3

Step

The first number is

283

4

Step

The second number is

280

5

Step

The difference between 283 and 280 is

283 - 280 = 3

6

Step

The difference between 280 and the next number is also

3

7

Step

So the next number is

280 - 3 = 277

8

Step

The difference between 277 and the next number is also

3

9

Step

So the next number is

277 - 3 = 274

10

Step

The difference between 274 and the next number is also

3

11

Step

So the next number is

274 - 3 = 271

12

Step

The difference between 271 and the next number is also

3

13

Step

So the next number is

271 - 3 = 268

14

Step

The difference between 268 and the next number is also

3

15

Step

So the next number is

268 - 3 = 265

16

Step

The difference between 265 and the next number is also

3

17

Step

So the next number is

265 - 3 = 262

18

Step

The difference between 262 and the next number is also

3

19

Step

So the next number is

262 - 3 = 259

20

Step

The difference between 259 and the next number is also

3

21

Step

So the next number is

259 - 3 = 256

22

Step

The difference between 256 and the next number is also

3

23

Step

So the next number is

256 - 3 = 253

24

Step

The difference between 253 and the next number is also

3

25

Step

So the next number is

253 - 3 = 250

26

Step

So the missing numbers are 277,274,268 262,256, and 250, and the complete sequence is 283,280,277,274,271,268,265,262,259,256,253,250.

27

Sumup

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

28

Choice.A

Incorrect .The numbers in this option do not follow the pattern of subtracting 3 from the previous number

280,277,269,273, 260 , 265

29

Choice.B

Correct. These numbers follow the established pattern of subtracting 3 from the previous number

277, 274, 268, 262, 256, 250

30

Choice.C

Incorrect. The numbers in this option do not match the pattern

280, 269, 266, 260, 258, 248 , 241

31

Choice.D

This is not correct because it does not follow the pattern of subtracting 3 from the previous number

277,269,266,,255,248,241,235

32

Answer

Option

B

33

Sumup

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


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