All the solutions provided in McGraw Hill My Math Grade 2 Answer Key PDF Chapter 6 Review will give you a clear idea of the concepts.

Vocabulary Check

ones
hundreds
tens
regroup
place value

Complete each sentence.

Question 1.
The numbers 0-9 are _______________.
Ones.

Explanation:
The numbers 0-9 are Ones.

Question 2.
The value given to a digit by its place in a number is its ______________.
Place value.

Explanation:
The value given to a digit by its place in a number is its place value.

Question 3.
The numbers 10-99 are _____________.
Tens.

Explanation:
The numbers 10-99 are tens.

Question 4.
The numbers 100-999 are _______________.
Hundreds.

Explanation:
The numbers 100-999 are hundreds.

Question 5.
When you _____________, you take a number apart and write it in a new way.
Regroup.

Explanation:
When you regroup, you take a number apart and write it in a new way.

Concept Check

Question 6. 200 + 100 = 300.

Explanation:
By adding 200 and 100 we will get 200+100 which is 300. Question 7. 400+500 = 900.

Explanation:
By adding 400 and 500 we will get 400+500 which is 900. Question 8. 500 + 300 = 800.

Explanation:
By adding 500 and 300 we will get 500+300 which is 800. Question 9. 354 + 100 = 454.

Explanation:
By adding 354 and 100 we will get 354+100 which is 454. Question 10. 327+10 = 337.

Explanation:
By adding 327 and 10 we will get 327+10 which is 337. Question 11. 356+100 = 456.

Explanation:
By adding 356 and 100 we will get 356+100 which is 456. Question 12. 275+116 = 391.

Explanation:
By adding 275 and 116 we will get 275+116 which is 391. Question 13. 434+247 = 681.

Explanation:
By adding 434 and 247 we will get 434+247 which is 681. Question 14. 367+226 = 593.

Explanation:
By adding 367 and 226 we will get 367+226 which is 593. Question 15. 777+133 = 910.

Explanation:
By adding 777 and 133 we will get 777+133 which is 910. Question 16. 397+159 = 556.

Explanation:
By adding 397 and 159 we will get 397+159 which is 556. Question 17. 487+247 = 734.

Explanation:
By adding 487 and 247 we will get 487+247 which is 734. Question 18.
395 + 154 395+154 = 549.

Explanation:
By adding 395 and 154 we will get 395+154 which is 549. Question 19.
225 + 353 225+353 = 578.

Explanation:
By adding 225 and 353 we will get 225+353 which is 578. Question 20.
348 + 273 348+273 = 621.

Explanation:
By adding 348 and 273 we will get 348+273 which is 621. Problem Solving

Question 21.
Nathan collected 109 pine cones. Elizabeth collected 100 pine cones. How many pine cones did they collect in all?
____________ pines cones
The total pine cones collected is 209.

Explanation:
Given that Nathan collected 109 pine cones and Elizabeth collected 100 pine cones. So the total cones did they collect in all is 109+100 which is 209 pine cones.

Question 22.
Olivia bakes 154 cookies with her grandma. Connor bakes 146 cookies with his grandma. How many cookies do Olivia and Connor bake in all?

Explanation:
Given that Olivia bakes 154 cookies with her grandma and Connor bakes 146 cookies with his grandma. So the total cookies baked by Olivia and Connor is 154+146 which is 300 cookies.

Test Practice

Question 23.
Last month, Riley watched 115 hours of television. This month, she will watch fewer hours of television. She wants to watch 200 hours for both months. How many hours can Riley watch this month?
(A) 85
(B) 95
(C) 185
(D) 315
A.

Explanation:
Given that Riley watched 115 hours of television this month, she will watch fewer hours of television as she wants to watch 200 hours for both months. So the number of hours can Riley watch this month is 200-115 which is 85 hours.

Reflect

Show the ways you can add three-digit numbers.

Regroup ones 101 + 129 = 230.

Explanation:
By adding 101 and 129 we will get 101+129 which is 230. Regroup tens 234+383 = 617.

Explanation:
By adding 234 and 383 we will get 234+383 which is 617. Regroup tens and ones 364 + 458 = 822.

Explanation:
By adding 364 and 458 we will get 364+458 which is 822. 358 + 100 = ____________
782 + ____________ = 792
358 + 100 = 458,
782 + 10 = 792.

Explanation: