We included HMH Into Math Grade 2 Answer Key PDF Module 12 Lesson 5 Add Two-Digit Numbers to make students experts in learning maths.
HMH Into Math Grade 2 Module 12 Lesson 5 Answer Key Add Two-Digit Numbers
(I Can) record the steps when adding two-digit numbers.
Step It Out
Question 1.
Omar and Lauren use blocks to build towers. Omar uses 36 blocks. Lauren uses 27 more blocks than Omar. How many blocks does Lauren use?
A. Add the ones.
6 + 7 = _________
Answer:
Given that the numbers 6 and 7 are in one place.
Adding 6 + 7 = 13
Adding 6 with 7 then we get 13.
B. Do you need to regroup? Circle Yes or No.
yes
no
Answer:
Regrouping means arranging the numbers according to their place values to perform their operations.
Yes, you need to regroup. Regrouping in addition is known as the carryover.
In the above addition, you have a carryover.
C. Regroup if you need to. Write 1 in the tens column to show the regrouped ten.
________ ones = ________ ten _________ ones
Answer:
After regrouping the numbers there are 13 ones.
13 ones = 1 ten 3 ones.
D. Write the number of ones left over in the ones place.
Answer:
3 number of ones are leftover in the one’s place.
E. Add the tens. Write that number in the tens place.
________ + 3 + 2 = _________
Answer:
We have number of tens = 1
1 + 3 + 2 = 6
F. Solve the problem,
_________ blocks
Answer:
After regrouping the numbers you have 1 block on the tens place.
Question 2.
Add 49 and 38.
A. Add the ones.
Answer:
In the 49 ones, the place is 9.
In the 38 the one place is 8.
9 + 8 = 17.
17 = One ten and 7 ones
B. Do you need to regroup? Explain.
Answer:
yes, we need to regroup.
Adding 49 + 38 in this case you need to regroup the numbers.
when you add the ones place digits 9 + 8, you get 17 which means 1 ten and 7 ones.
Know to regroup the tens into the tens place and leave the ones. Then 49 + 38 = 87.
C. Write the number of ones left over in the ones place.
Answer:
The number of ones left over in the ones place is 7.
D. Add the tens.
Answer:
In the tens place, we have 4 and 3.
After regrouping we have 1 ten.
1 + 4 + 3 = 8.
E. Write the sum. 49 + 38 = _____
Answer:
49 + 38 = 87
Adding 49 with 38 then we get 87.
Turn and Talk When adding two-digit numbers, do you always need to regroup? Explain.
Answer:
When adding two digits numbers first add the one’s place. By adding the one place if you get the two digits number then only the two digits numbers are regrouping.
If the addition of one’s place digits is only the 1 digit number then the numbers are not regrouped.
Check Understanding
Add. Regroup if you need to.
Question 1.
Answer:
Adding 36 + 57 in this case you need to regroup the numbers.
when you add the ones place digits 6 + 7, you get 13 which means 1 ten and 3 ones.
Know to regroup the tens into the tens place and leave the ones. Then 36 + 57 = 93.
Question 2.
Answer:
Adding 54 + 25 in this case regrouping the numbers is not possible.
when you add the one’s place. If the answer is less than 10 then regrouping is not possible. If the answer is greater than 10 then the regroup is applicable.
54 + 25 = 79.
On Your Own
Question 3.
Attend to Precision Kyle puts 28 coins in a jar. Li puts 46 more coins in the jar than Kyle. How many coins does Li put in the jar?
________ coins
Answer:
Given that,
Kyle put the coins in the jar = 28
li put the coins greater than the kyle = 46
li put the coins is 28 + 46 =74.
In this case, you need to regroup the numbers.
when you add the ones place digits 8 + 6, you get 14 which means 1 ten and 4 ones.
Know to regroup the tens into the tens place and leave the ones.
Use Structure Add. Regroup if you need to.
Question 4.
Answer:
Adding 53 + 39 in this case you need to regroup the numbers.
when you add the ones place digits 3 + 9, you get 12 which means 1 ten and 2 ones.
Know to regroup the tens into the tens place and leave the ones. Then 53 + 39 = 92.
Question 5.
Answer:
64 + 25 = 89
The addition of one place is less than 10.
There is no need for regrouping.
Question 6.
Answer:
27 + 40 = 67
The addition of one place is less than 10.
There is no need for regrouping.
Question 7.
Open Ended There are 54 notebooks in a box. Some notebooks are blue. Some notebooks are red. How many notebooks of each color could be in the box?
_________ blue notebooks
_________ red notebooks
Answer:
On Your Own
Question 8.
Attend to Precision Jessica has 18 ribbons. Then a friend gives her 8 more ribbons. How many ribbons does Jessica have now?
________ ribbons
Answer:
Given that,
The total number of ribbons near Jessica = 18.
The total number of ribbons her friend gave = 8
The total number of ribbons near Jessica = 18 + 8 = 26.
Therefore Jessica has 24 ribbons.
Question 9.
Construct Arguments Explain the addition that you did to solve Problem 8. Be sure to tell about the values of the digits in the numbers.
Answer:
Use Tools Add. Regroup if you need to.
Question 10.
Answer:
29 + 5 = 34.
The addition of tens place in the numbers is greater than the 10.
In this case, you need to regroup the numbers.
when you add the ones place digits 9 + 5, you get 14 which means 1 ten and 4 ones.
Know to regroup the tens into the tens place and leave the ones.
Question 11.
Answer:
47 + 24 = 71
The addition of tens place in the numbers is greater than the 10.
In this case, you need to regroup the numbers.
when you add the ones place digits 7 + 4, you get 11 which means 1 ten and 1 ones.
Know to regroup the tens into the tens place and leave the ones.
Question 12.
Answer:
64 + 22 = 84
The addition of one place in the number is less than 10.
There is no need for regrouping.
Question 13.
Answer:
76 + 13 = 89
The addition of one place in the number is less than 10.
There is no need for regrouping.
Question 14.
Answer:
63 + 18 = 81
The addition of tens place in the numbers is greater than the 10.
In this case, you need to regroup the numbers.
when you add the ones place digits 3 + 8, you get 11 which means 1 ten and 1 ones.
Know to regroup the tens into the tens place and leave the ones.
Question 15.
Answer:
77 + 8 = 85
The addition of tens place in the numbers is greater than the 10.
In this case, you need to regroup the numbers.
when you add the ones place digits 7 + 8, you get 15 which means 1 ten and 5 ones.
Know to regroup the tens into the tens place and leave the ones.
Question 16.
Answer:
52 + 27 = 79
The addition of one place in the number is less than 10.
There is no need for regrouping.
Question 17.
Answer:
36 + 34 = 70.
In this case, you need to regroup the numbers.
when you add the ones place digits 6 + 4, you get 10 which means 1 ten and 0 ones.
Know to regroup the tens into the tens place and leave the ones.
Question 18.
Answer:
56 + 27 = 83
In this case, you need to regroup the numbers.
when you add the ones place digits 6 + 7, you get 13 which means 1 ten and 3 ones.
Know to regroup the tens into the tens place and leave the ones.
