We included HMH Into Math Grade 2 Answer Key PDF Module 14 Lesson 1 Use Drawings to Represent Addition and Subtraction Situations to make students experts in learning maths.
HMH Into Math Grade 2 Module 14 Lesson 1 Answer Key Use Drawings to Represent Addition and Subtraction Situations
I Can represent addition and subtraction word problems with bar models and equations.
Spark Your Learning
Shiloh draws the number cards 4, 12, and 8. What equations can Shiloh write?
Shiloh is playing a game in math class. She draws three number cards from the deck: 4, 12, and 8. Use these numbers to write an addition equation and a subtraction equation. Represent your equations with visual models.
Answer:
4 + 8 = 12
12 – 4 = 8
Explanation:
When we add 4 and 8, we get the sum 12.
When we subtract 4 from 12, we get the difference 8.
Build Understanding
Trevor buys 3 large postcards and 7 small postcards. How many postcards does Trevor buy?
A. Represent this problem with a concrete model.
Answer:
B. Use your concrete model to complete this bar model.
Answer:
C. Model this problem with an equation.
___ + ___ = ____
Answer:
3 + 7 = 10
D. Solve. Trevor buys 10 postcards.
Trevor mails 7 postcards. How many postcards are left?
Answer:
10 – 7 = 3
3 postcards left.
A. Represent this problem with a concrete model.
Answer:
B. Use your concrete model to complete this bar model.
Answer:
C. Model this problem with an equation.
Answer:
10 – 7 = 3
D. Solve. There are postcards left.
Answer:
3 postcards left.
Explanation:
Trevor buys 3 large postcards and 7 small postcards.
Total postcards Trevor buy = 7 + 3 = 10
Turn and Talk How do you know which bar represents each addend?
Answer:
we write addends in one of the box and the box is for missing addend which is empty.
Explanation:
Bar model help us to write addition sentence or equation.
The addends are written in the boxes and sum is written below the brackets.
Erik has 14 marbles. He has red marbles and green marbles. Erik has more green marbles than red marbles. How many marbles of each color could Erik have?
A. Color to show the number of red marbles and the number of green marbles that Erik could have. Use a red crayon and a green crayon.
Answer:
B. Complete the bar model to show the number of red marbles and the number of green marbles.
THINK: How many cubes did I color red?
How many cubes did I color green?
Answer:
C. Use the numbers from your bar model to write an addition equation.
____ = ___ + ____
Answer:
14 = 9 + 5
D. Solve. Erik has red marbles and ___ green marbles.
Answer:
Erik has red marbles and 9 green marbles.
E. Use the numbers from your bar model to write a subtraction equation.
___ – ____ = ____
Answer:
14 – 5 = 9
Explanation:
Erik has 14 marbles.
He has red marbles and green marbles.
Erik has more green marbles than red marbles.
Number of marbles of each color could Erik have are,
9 green marbles, 5 red marbles.
Step It Out
1. There are 12 eggs. 7 eggs are white and the rest are brown. How many eggs are brown?
A. Complete the bar model to represent this problem.
Answer:
B. Model the problem with an addition equation.
Answer:
12 = 7 + 5
C. Model the problem with a subtraction equation.
Answer:
12 – 7 = 5
D. Solve. How many eggs are brown?
Answer:
5 brown eggs
Explanation:
There are 12 eggs.
7 eggs are white and the rest are brown.
Number of brown eggs 12 – 7 = 5
Check Understanding Math Board
Question 1.
Maria picks 18 flowers. 9 flowers are white and the rest are pink. How many flowers are pink? Complete the bar model and the equation. Solve.
Answer:
Explanation:
Maria picks 18 flowers.
9 flowers are white and the rest are pink.
Number of pink flowers = 18 – 9 = 9
On Your Own
Model with Mathematics Complete the bar model and the equation. Solve.
Question 2.
Janette has 17 grapes. She has 8 green grapes and the rest are red. How many red grapes does Janette have?
Answer:
Explanation:
Janette has 17 grapes.
She has 8 green grapes and the rest are red.
Number of red grapes Janette have 17 – 8 = 9
Question 3.
Anton has 6 nickels and 7 pennies. How many coins does he have?
Answer:
13 coins
Explanation:
Anton has 6 nickels and 7 pennies.
Number of coins does he have 6 + 7 = 13
Question 4.
Frogs can live in water or on land. While on a walk, Tala counts 5 frogs on a log. Some more frogs hop on the log. Now Tala counts I I frogs. How many frogs hop on the log?
Answer:
6 frogs
Explanation:
5 frogs on a log
X frogs hop on the log
Tala counts I I frogs
X + 5 = 11 frogs
X = 6
On Your Own
Brady counts 14 green trucks and 5 yellow trucks.
Question 5.
Use Structure How many trucks does Brady count? Complete the bar model and the equation. Solve.
Answer:
14 + 5 = 19
Explanation:
Brady counts 14 green trucks and 5 yellow trucks.
Total trucks Brady count = 14 + 5 = 19
Question 6.
Construct Arguments Describe how you completed the bar model to solve the problem.
Answer:
One should complete the bar model by including all the information given in the problem.
Then decide what the unknown is and how this can be calculated.
Finally complete the calculation to work out the answer to the problem.
Explanation:
Bar model is a pictorial representation of a number in the form of bars or boxes used to solve number problems. Bar models help us to attain an understanding of how a problem needs to be solved and calculated.
Here, for instance, one rectangle or box of the bar model represents a value of 6.
I’m in a Learning Mindset!
How do I make sure I’m not distracting others when I’m working?
Answer:
Answer may vary from student to student.
Explanation:
I make sure I’m not distracting others when I’m working,
* Before starting of work I make sure that the work place is quite pleasant,
without any distractions.
* I will take short breaks in between.
* I will keep the devices out of my sight.