We included HMH Into Math Grade 2 Answer Key PDF Module 20 Review to make students experts in learning maths.

Concepts and Skills

Use the yardstick to solve.

Question 1.
15 + 9 = __________
15 + 9 = 24
Explanation:
The sum of 15 and 9 is 24

Question 2.
28 – 11 = ___________
28 – 11 = 17
Explanation:
The difference of 28 and 11 is 17

Question 3.
3 + 26 = ____________
3 + 26 = 29
Explanation:
The sum of 3 and 26 is 29

Write an equation using for the unknown number. Use the number line to solve.

Question 4.
Julio draws a line 12 inches long. Then he adds another 18 inches to the line. How long is the line?

The line is __________ inches long.
The line is 30 inches long.
Explanation:
Julio draws a line 12 inches long.
Then he adds another 18 inches to the line.
18 + 12 = 30

Question 5.
Wendy has a piece of ribbon that is 18 centimeters long. She cuts off 9 centimeters. How much ribbon is there now?

There are __________ centimeters of ribbon now.
There are 9 centimeters of ribbon now.
Explanation:
Wendy has a piece of ribbon that is 18 centimeters long.
She cuts off 9 centimeters.
18 – 9 = 9

Use the number line to solve. Fill in the bubble next to the correct answer.

Question 6.
Daniella has 47 inches of ribbon. Iggy has 50 inches of ribbon. Which of the following statements is true?
(A) Daniella’s ribbon is 3 inches longer than Iggy’s ribbon.
(B) Daniella’s ribbon is 3 inches shorter than Iggy’s ribbon.
(C) Iggy’s ribbon is 3 inches shorter than Daniella’s ribbon.
Explanation:
Daniella’s ribbon is 3 inches shorter than Iggy’s ribbon.

Question 7.
Gobi makes a shell necklace that is 44 centimeters long. Then he makes it 14 centimeters longer. How long is the shell necklace now?
(A) 30 centimeters
(B) 48 centimeters
(c) 58 centimeters
Gobi makes a shell necklace that is 44 centimeters long.
Then he makes it 14 centimeters longer.
44 + 14 = 58 centimeters longer.

Question 8.
Measure each item. Write an equation to find the difference. Compare the lengths.

___________ centimeters

___________ centimeters
The pencil is ___________ centimeters ___________ than the marker.