We included HMH Into Math Grade 1 Answer Key PDF Module 2 Lesson 6 Choose a Strategy to Subtract to make students experts in learning maths.
HMH Into Math Grade 1 Module 2 Lesson 6 Answer Key Choose a Strategy to Subtract
I Can choose a strategy to solve a subtraction problem.
Step It Out
Eduardo has 14 pens. 6 are blue. The rest are red. How many pens are red?
14 – 6 = 
1. One way: Count more to make a ten.
A. Start with 6. Count ___ to make 10. Then count ___ more to make 14•
B. How many more did you count in all? ___
C. So, 14 – 6 = ___
Answer:
14 – 6 = 8
Explanation:
Eduardo has 14 pens. 6 are blue. The rest are red
Start at 6
Count 4 more to make 10. Then count 4 more to make 14
I counted 8 in all
So, 14 – 6 = 8.
2. Another way: Subtract to make a ten.
A. THINK: I need to subtract 6 in all. Subtract 4 from 14 to make a ten. Then subtract 2 more.
B. Solve the new equation.
C. So, 14 – 6 = ____
D. ___ pens are red.
Answer:
Explanation:
Make ten
14 – 4 = 10
10 – 2 = 8
So, 14 – 6 = 8.
Step It Out
11 balloons are the air. 8 fall down. The rest go up. How many balloons go up?
3. One way: Add to subtract 11—8.
A. THINK: If I have 8, how many more to make 11 ?
8 + ___ = ___
B. So, 11 – 8 = __
Answer:
11 balloons are the air. 8 fall down. The rest go up
If I have 8, how many more to make 11 ?
8 + 3 = 11
So, 11 – 8 = 3.
4. Another way: Count on to subtract 11 – 8.
A. Start with 8. Count on to 11.
How many did you count on? ___
B. So, 11 – 8 = __
C. ___ balloons go up.
Answer:
I start with 8
Count on to 11
I counted 3
So, 11 – 8 = 3
So, 3 balloons go up.
Turn and Talk Is there another way you can subtract 11 – 8? Explain.
Brianna picks 8 apples. She gives 2 apples away. How many apples does she have now?
5. Count back to subtract 8 – 2.
A. Start on ___. Count back ___.
B. Draw the jumps on the number line. What number do you land on? ___
C. So, 8 – 2 = __
D. Brianna has ___ apples now.
Answer:
Explanation:
Brianna picks 8 apples
She gives 2 apples away
Start on 8
Count back 2
I reach at 6
So, 8 – 2 = 6
Therefore, Brianna has 6 apples now.
Check Understanding Math Board
Use any strategy to solve. Write the equation.
Question 1.
Nate has 14 apples. He gives 5 of them to friends. How many apples does he have now?
___ – ___ = ____
Nate has ___ apples now.
Answer:
14 – 5 = 9
Nate has 9 apples now.
Explanation:
I start with 5
Count on to 14
I counted 9
So, 14 – 5 = 9
therefore, Nate has 9 apples now.
On Your Own
Question 2.
Model with Mathematics Lynn has 16 balloons. 7 are blue. The rest are pink. How many balloons are pink? Draw 
to show your work. Write the equation.
____ – ___ = ___
___ balloons are pink.
Answer:
Explanation:
Eduardo has 16 pens. 7 are blue. The rest are pink
Start at 7
Count 3 more to make 10. Then count 6 more to make 16
I counted 9 in all
So, 16 – 7 = 9
Therefore, 9 balloons are pink.
Question 3.
Use Tools Meghan picks 10 tomatoes. Then she gives 2 tomatoes away. How many tomatoes does she have now? Draw jumps on the number line to solve.
Meghan has ____ tomatoes now.
Answer:
Explanation:
Meghan picks 10 tomatoes
Then she gives 2 tomatoes away
Start at 10
Counted back 2
I reached at 8
So, 10 – 2 = 8
therefore, Meghan has 8 tomatoes now.
Use any strategy to subtract.
Question 4.
12 – 5 = ___
Answer:
12 – 5 = 7
Explanation:
Make 10:
12 – 5 =
12 – 2 – 3 =
10 – 3 = 7
So, 12 – 5 = 7.
Question 5.
16 – 8 = __
Answer:
16 – 8 = 8
Explanation:
Start at 8
Count up till16
I counted 8 more
So, 16 – 8 = 8.
Question 6.
13 – 9 = ___
Answer:
13 – 9 = 4
Explanation:
Start at 13
Count back 9
I reach at 4
So, 13 – 9 = 4.
Use any strategy to solve. Write the equation.
Question 7.
A squirrel hides 17 acorns in the ground. Later, the squirrel digs up 9 of them. How many acorns are in the ground now?
___ – ___ = ___
___ acorns are in the ground now.
Answer:
17 – 9 = 8
8 acorns are in the ground now.
Explanation:
A squirrel hides 17 acorns in the ground
Later, the squirrel digs up 9 of them
Start at 9
Count till 17
I counted 8 more
So, 17 – 9 = 8
Therefore, there are 8 acorns in the ground now.
Question 8.
Brianna studies the weather for 12 days. 3 days are rainy. The rest are sunny. How many days are sunny?
___ – ___ = ___
___ days are sunny.
Answer:
12 – 3 = 9
9 days are sunny
Explanation:
Brianna studies the weather for 12 days
3 days are rainy
Start at 12
Count back 3
I reach at 9
So, 12 – 3 = 9
Therefore, 9 days are sunny.
Question 9.
Model with Mathematics Jessica has 9 marbles. 6 are green. The rest are blue. How many blue marbles does she have?
___ – ___ = ___
___ blue marbles
Answer:
9 – 6 = 3
3 blue marbles
Explanation:
Jessica has 9 marbles
6 are green
The rest are blue
Start at 6
Count on till 9
I counted 3 more
So, 9 -6 = 3
therefore, there are 3 blue marbles.
Use any strategy to subtract.
Question 10.
11 – 2 = ___
Answer:
11 – 2 = 9
Explanation:
Start at 11
Count back 2
I reach at 9
So, 11 -2 = 9.
Question 11.
___ = 14 – 7
Answer:
14 – 7 = 7
Explanation:
Make Ten:
14 – 7 =
14 – 4 – 3 =
10 – 3 = 7
So, 14 – 7 = 7.
On your Own
Use any strategy to solve. Write the equation.
Question 12.
Model with Mathematics Norbert collects 9 toy trains. He gives 2 of them away. How many toy trains does he have now?
___ – ___ =___
___ toy trains
Answer:
9 – 2 = 7
7 Toy trains
Explanation:
Norbert collects 9 toy trains
He gives 2 of them away
Start at 9
Count back 2
I reach at 7
So, 9 – 2 = 7.
Question 13.
Attend to Precision Draw to show a way to subtract 12 – 7. Then write to explain your strategy.
Answer:
Explanation:
Make Ten to subtract:
12 – 7 =
12 – 2 – 5
10 – 5 = 5
So, 12 – 7 = 5.