All the solutions provided in McGraw Hill My Math Grade 2 Answer Key PDF Chapter 7 Lesson 1 Take Apart Hundreds to Subtract will give you a clear idea of the concepts.
McGraw-Hill My Math Grade 2 Answer Key Chapter 7 Lesson 1 Take Apart Hundreds to Subtract
Explore and Explain
________________ crayons
Teacher Directions: At the beginning of the year, Mrs. Jones put 403 new crayons in the crayon bucket. After the first month of school, 97 crayons were lost. How many crayons were left in the bucket? Use base-ten blocks to help you solve the problem. Draw the blocks you used and write the answer.
Answer:
403 – 97 = 306
There are 306 crayons left in the bucket.
Explanation:
100 – 97 = 3
303 + 3 = 306
So, 403 – 97 = 306
See and Show
You can take apart hundreds to subtract mentally.
Take apart 800 as 700 and 100 since it is easier to subtract 98 from 100.
Take apart 401 as 301 and 100 since it is easier to subtract 97 from 100.
Take apart hundreds to subtract.
Question 1.
__________ – 99 = _____________
__________ + ___________ = ___________
So, 300 – 99 = ____________.
Answer:
201
Explanation:
100 – 99 = 1
200 + 1 = 201
So, 300 – 99 = 201
Question 2.
__________ – 98 = _____________
__________ + ___________ = ___________
So, 422 – 98 = ____________.
Answer:
324
Explanation:
100 – 98 = 2
322 + 2 = 324
So, 422 – 98 = 324
Talk Math In Exercise 2, why is 2 added back?
Answer:
To get the final result 2 is added back.
Explanation:
In exercise 2 the given number is 422 – 98
Take apart 422 as 322 and 100 since it is easier to subtract 98 from 100.
100 – 98 = 2
322 + 2 = 324
Here 2 is added back to get the final result.
On Your Own
Take apart hundreds to subtract.
Question 3.
__________ – 99 = _____________
__________ + ___________ = ___________
So, 240 – 99 = ____________.
Answer:
141
Explanation:
100 – 99 = 1
140 + 1 = 141
So, 240 – 99 = 141
Question 4.
__________ – 98 = _____________
__________ + ___________ = ___________
So, 700 – 98 = ____________.
Answer:
602
Explanation:
100 – 98 = 2
600 + 2 = 602
So, 700 – 98 = 602
Question 5.
__________ – 97 = _____________
__________ + ___________ = ___________
So, 542 – 97 = ____________
Answer:
445
Explanation:
100 – 97 = 3
442 + 3 = 445
So, 542 – 97 = 445
Question 6.
__________ – 98 = _____________
__________ + ___________ = ___________
So, 702 – 98 = ____________.
Answer:
604
Explanation:
100 – 98 = 2
602 + 2 = 604
So, 702 – 98 = 604
Question 7.
__________ – 97 = _____________
__________ + ___________ = ___________
So, 200 – 97 = ____________.
Answer:
103
Explanation:
100 – 97 = 3
100 + 3 = 103
So, 200 – 97 = 103
Question 8.
__________ – 99 = _____________
__________ + ___________ = ___________
So, 711 – 99 = ____________.
Answer:
612
Explanation:
100 – 99 = 1
611 + 1 = 612
So, 711 – 99 = 612
Problem Solving
Question 9.
Eli counts 335 sunflower seeds. He places 98 of the seeds in a bowl. How many seeds were left?
_____________ sunflower seeds
Answer:
237 sunflower seeds.
Explanation:
335 – 98
235 100 – 98
100 – 98 = 2
235 + 2 = 237
So 335 – 98 = 237
Question 10.
Rachel has 148 blueberries. She gives 97 blueberries to her brother. How many blueberries does Rachel have left?
_______________ blueberries
Answer:
148 – 97 = 51
Explanation:
Given,
Rachel has 148 blueberries and She gives 97 blueberries to her brother
148 – 97
148 100 – 3
148 – 100 = 48
48 + 3 = 51
Question 11.
382 people were in our school auditorium. 99 people left. How many people are still in the auditorium?
______________ people
Answer:
283 people.
Explanation:
382 people were in our school auditorium
99 people left
382 – 99
282 100 – 99
100 – 99 = 1
282 + 1 = 283
382 – 99 = 283
There are still 283 people in the auditorium.
HOT Problem Explain in words how to solve 700 – 97.
Answer:
603
Explanation:
Given,
700 – 97
take apart hundreds to subtract mentally.
600 100 -97
100 – 97 = 3
600 + 3 = 603
So 700 – 97 = 603
McGraw Hill My Math Grade 2 Chapter 7 Lesson 1 My Homework Answer Key
Practice
Take apart hundreds to subtract.
Question 1.
____________ – ____________ = ____________
____________ + ____________ = ____________
So, 835 – 98 = _______________.
Answer:
737
Explanation:
100 – 98 = 2
735 + 2 = 737
So, 835 – 98 = 737
Question 2.
____________ – ____________ = ____________
____________ + ____________ = ____________
So, 748 – 97 = _______________.
Answer:
651
Explanation:
100 – 97 = 3
648 + 3 = 651
So, 748 – 97 = 651
Question 3.
____________ – ____________ = ____________
____________ + ____________ = ____________
So, 395 – 99 = _______________.
Answer:
296
Explanation:
100 – 99 = 1
295 + 1 = 296
So, 395 – 99 = 296
Question 4.
____________ – ____________ = ____________
____________ + ____________ = ____________
So, 600 – 97 = _______________.
Answer:
503
Explanation:
100 – 97 = 3
500 + 3 = 503
So, 600 – 97 = 503
Question 5.
Students go to school for 180 days. 96 school days were sunny. How many school days were not sunny?
____________ days
Answer:
84 days
Explanation:
100 – 96 = 4
80 + 4 = 84
So. 180 – 96 = 84
Test Practice
Question 6.
How would you take apart 355 to solve 355 – 94?
(A) 355 and 100
(B) 300 and 55
(C) 255 and 100
(D) 255 and 94
Answer:
255 and 100
Explanation:
Math at Home Have your child solve 321 – 99 by taking apart hundreds to subtract.
Answer:
222
Explanation:
100 – 99 = 1
221 + 1 = 222
So, 321 – 99 = 222