Practice questions available in McGraw Hill Math Grade 2 Answer Key PDF Chapter 5 Lesson 7 Use Mental Math to Add 10s or 100s to a Number will engage students and is a great way of informal assessment.
McGraw-Hill Math Grade 2 Answer Key Chapter 5 Lesson 7 Use Mental Math to Add 10s or 100s to a Number
Use mental math to add. Write the sum.
Question 1.
527 + 10 = 537
Question 2.
366 + 30 = ___
Answer:
396
Explanation:
Use mental math to add
Add only tens
60 + 30 = 90
So, 366 + 30 = 396
Question 3.
568 + 400 = _____
Answer:
968
Explanation:
Use mental math to add
Add only hundreds
500 + 400 = 900
So, 568 + 400 = 968.
Question 4.
263 + 200 = ___
Answer:
463
Explanation:
Use mental math to add
Add only hundreds
200 + 200 = 400
So, 263 + 200 = 463.
Question 5.
Answer:
Explanation:
The sum of 100 and 690 is 790.
Question 6.
Answer:
Explanation:
The sum of 454 and 300 is 754.
Question 7.
Answer:
Explanation:
The sum of 319 and 50 is 369.
Question 8.
Answer:
Explanation:
The sum of 40 and 845 is 885.