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Lesson Example Discussion Quiz: Class Homework

Step-3

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 199 _ 203 _ 207 _ 211 _ 215 _ 219 _ 223.
2	Step	The first number is	199
3	Step	The second number is missing, and it should be obtained by adding 2 to the first number	199 + 2 = 201
4	Step	The third number is 203, which is obtained by adding 2 to the second number	201 + 2 = 203
5	Step	The fourth number is missing, and it should be obtained by adding 2 to the third number	203 + 2 = 205
6	Step	The fifth number is 207, which is obtained by adding 2 to the fourth number	205 + 2 = 207
7	Step	The sixth number is missing, and it should be obtained by adding 2 to the fifth number	207 + 2 = 209
8	Step	The seventh number is 211, which is obtained by adding 2 to the sixth number	209 + 2 = 211
9	Step	The eighth number is missing, and it should be obtained by adding 2 to the seventh number	211 + 2 = 213
10	Step	The ninth number is 215, which is obtained by adding 2 to the eighth number	213 + 2 = 215
11	Step	The tenth number is missing, and it should be obtained by adding 2 to the ninth number	215 + 2 = 217
12	Step	The eleventh number is 219, which is obtained by adding 2 to the tenth number	217 + 2 = 219
13	Step	The twelfth number is missing, and it should be obtained by adding 2 to the eleventh number	219 + 2 = 221
14	Step	The thirteenth number is 223, which is obtained by adding 2 to the twelfth number	221 + 2 = 223
15	Step	So, the missing numbers are 201,205,209, 213,217, and 221, and the complete sequence is 199,201,203,205,207,209,211,213,215,217,219,221,223.
16	Sumup	Can you summarize what you’ve understood in the above steps?
17	Choice.A	This sequence doesn’t follow the pattern. For example, the second number (203) is correct, but the third number (207) is incorrect. It should be 205	185,203,207,220,209,227,240,,255,267
18	Choice.B	This sequence doesn’t follow the pattern either. For example, the fifth number (227) is incorrect. It should be 209	185, 203, 207, 220, 227, 229, 240, 255, 267
19	Choice.C	This sequence also deviates from the pattern. For example, the fifth number (220) is incorrect. It should be 207	185, 203, 207, 209, 220, 227, 240, 267
20	Choice.D	This is correct because it follows the established pattern of adding 2 to the previous number	201, 205, 209, 213, 217, 221
21	Answer	Option	D
22	Sumup	Can you summarize what you’ve understood in the above steps?

Step

Type

Explanation

Answer

Problem

Identify the missing numbers 199 _ 203 _ 207 _ 211 _ 215 _ 219 _ 223.

Step

The first number is

199

Step

The second number is missing, and it should be obtained by adding 2 to the first number

199 + 2 = 201

Step

The third number is 203, which is obtained by adding 2 to the second number

201 + 2 = 203

Step

The fourth number is missing, and it should be obtained by adding 2 to the third number

203 + 2 = 205

Step

The fifth number is 207, which is obtained by adding 2 to the fourth number

205 + 2 = 207

Step

The sixth number is missing, and it should be obtained by adding 2 to the fifth number

207 + 2 = 209

Step

The seventh number is 211, which is obtained by adding 2 to the sixth number

209 + 2 = 211

Step

The eighth number is missing, and it should be obtained by adding 2 to the seventh number

211 + 2 = 213

Step

The ninth number is 215, which is obtained by adding 2 to the eighth number

213 + 2 = 215

Step

The tenth number is missing, and it should be obtained by adding 2 to the ninth number

215 + 2 = 217

Step

The eleventh number is 219, which is obtained by adding 2 to the tenth number

217 + 2 = 219

Step

The twelfth number is missing, and it should be obtained by adding 2 to the eleventh number

219 + 2 = 221

Step

The thirteenth number is 223, which is obtained by adding 2 to the twelfth number

221 + 2 = 223

Step

So, the missing numbers are 201,205,209, 213,217, and 221, and the complete sequence is 199,201,203,205,207,209,211,213,215,217,219,221,223.

Sumup

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

Choice.A

This sequence doesn’t follow the pattern. For example, the second number (203) is correct, but the third number (207) is incorrect. It should be 205

185,203,207,220,209,227,240,,255,267

Choice.B

This sequence doesn’t follow the pattern either. For example, the fifth number (227) is incorrect. It should be 209

185, 203, 207, 220, 227, 229, 240, 255, 267

Choice.C

This sequence also deviates from the pattern. For example, the fifth number (220) is incorrect. It should be 207

185, 203, 207, 209, 220, 227, 240, 267

Choice.D

This is correct because it follows the established pattern of adding 2 to the previous number

201, 205, 209, 213, 217, 221

Answer

Option

Sumup

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