We included HMH Into Math Grade 2 Answer Key PDF Module 11 Lesson 2 Decompose Ones to Subtract to make students experts in learning maths.
HMH Into Math Grade 2 Module 11 Lesson 2 Answer Key Decompose Ones to Subtract
I Can break apart ones to make a tens number when I subtract.
Spark Your Learning
How can you break apart a number to find how many birds
are in the tree now?
There are _____7_____ birds in the tree now.
Read the following: There are 16 birds in a tree.
Then, 9 of the birds flyaway. How many birds are in the tree now?
Make a concrete model or draw to show the problem.
Answer:
There are 7 birds in the tree now,
Explanation:
Given there are 16 birds in a tree.
Then, 9 of the birds flyaway.
Drawn to show the problem,
while subtracting I broke apart ones to make a
tens number when I subtract as 16 – 9,
16 – 6 – 3,
10 – 3 = 7, there are 7 birds in the tree now.
Build Understanding
Question 1.
Jason has 24 marbles. He gives 7 marbles to Bianca. How many marbles does Jason have now?
A. How can you show the number of marbles Jason has to start?
Circle the marbles he gives to Bianca.
Answer:
Explanation:
Showed the number 24 of marbles Jason has to start,
Circled 7 marbles he gives to Bianca as shown above.
B. Use your drawing. Cross out to show how many you take away to get to the tens number.
Answer:
Explanation:
Used my drawing. Crossed out 4 to show to take away to
get to the tens number.
C. Now, cross out to show how many marbles you still need to subtract to show the marbles Jason gives to Bianca.
Answer:
Explanation:
Now crossed out 3 more to show marbles I
still need to subtract to show the marbles Jason
gives to Bianca.
D. How can you complete the equations to show your drawing?
Answer:
Explanation:
Completed the equations to show my drawing first
showed the number 24 of marbles Jason has to start,
Crossed out 4 to show to take away to get to the
tens number then crossed out 3 more to show marbles I
still need to subtract to show the marbles Jason
gives to Bianca. So 24 – 7,
24 – 4 – 3,
20 – 3 = 17 completed the equation.
E. Solve.
Jason has ___17_____ marbles now.
Answer:
Jason has 17 marbles now,
Explanation:
Given Jason has 24 marbles. He gives 7 marbles to Bianca
solving the equation 24 – 7,
24 – 4 – 3,
20 – 3 = 17, therefore Jason has 17 marbles now.
Turn and Talk How does breaking apart ones to
subtract help you solve subtraction problems? Explain.
Answer:
We can easily substract the numbers by breaking apart
ones ,
Explanation:
Instead of substracting directly we break the ones
we will start with the first number. Then break the second
number into tens and ones. Subtract the tens to
get a new difference. Then subtract the ones from that number
which will be very easy while subtracting.
Question 2.
Marta has 34 pennies. She gives 6 pennies to Alison. How many pennies does Marta have now?
A. Draw to show the problem.
Answer:
Explanation:
Drawn Marta has 34 pennies. Circled 6 pennies
which she gave to Alison.
B. How can you use your drawing to complete the equations?
Answer:
Explanation:
From the drawings took Marta has 34 pennies and
6 pennies which she gave to Alison used to complete
the equation 34 – 6,
34 – 4 – 2,
30 – 2 = 28.
C. Solve.
Marta has ____28_____ pennies now.
Answer:
Marta has 28 pennies now,
Explanation:
Given Marta has 34 pennies. She gives 6 pennies to Alison.
While subtracting I broke apart 6 ones to make a
tens number when I subtract as 34 – 4 – 2,
30 – 2 = 28, therefore Marta has 28 pennies now.
Check Understanding :
Question 1.
Break apart ones to subtract. Complete the equations to solve.
Nathan has 27 blocks. He gives 8 blocks to Shawna. How many blocks does Nathan have now?
Nathan has ____19_____ blocks now.
Answer:
Nathan has 19 block now,
Explanation:
Nathan has 27 blocks. He gives 8 blocks to Shawna.
So 27 – 8, We break apart ones to subtract as
27 – 7 – 1,
20 -1 = 19, therefore Nathan has 19 block now.
On Your Own
Break apart ones to subtract. Complete the equations to solve.
Question 2.
Reason Dana has 15 toy airplanes. She gives 8 to Jose. How many toy airplanes does Dana have now?
Dana has ____7____ toy airplanes now.
Answer:
Dana has 7 toy airplanes now,
Explanation:
Given Dana has 15 toy airplanes. She gives 8 to Jose.
Equation is 15 – 8, We break apart 8 ones to subtract as
15 – 5 – 3,
10 – 3 = 7, Dana has 7 toy airplanes now.
Question 3.
Open Ended Choose two numbers to subtract. Complete the equations.
Answer:
Explanation:
Taken two numbers to subtract 62 and 4,
the eqaution is 62 – 4,We break apart 4 ones to subtract as
62 – 2 – 2,
60 – 2 =58.
I’m in a Learning Mindset!
How do I switch my attention from one problem step to another?
Answer:
Thinking Challengingly,
Explanation:
I switch my attention from one problem
step to another thinking that the next step is more
challenging and intresting to solve.