Engage NY Eureka Math 2nd Grade Module 2 Lesson 5 Answer Key

Eureka Math Grade 2 Module 2 Lesson 5 Problem Set Answer Key

First, estimate the length of each line in centimeters using mental benchmarks.
Then, measure each line with a centimeter ruler to find the actual length.

Question 1.
_____________________________________
a. Estimate: __7____ cm
b. Actual length: __ 8____ cm
a. Estimate: __7____ cm,
b. Actual length: __ 8____ cm,

Explanation:
First, estimated the length of each line in centimeters using
mental benchmarks.
Then, measured each line with a centimeter ruler to find
the actual length so a. Estimate: __7____ cm,
b. Actual length: __ 8____ cm.

Question 2.
_____________________________________
a. Estimate: __20____ cm
b. Actual length: __15____ cm
a. Estimate: __20___ cm,
b. Actual length: __ 15__ cm,

Explanation:
First, estimated the length of each line in centimeters using
mental benchmarks.
Then, measured each line with a centimeter ruler to find
the actual length so a. Estimate: __20_ cm,
b. Actual length: __15__ cm.

Question 3.
_____________________________________
a. Estimate: __13___ cm
b. Actual length: ___11___ cm
a. Estimate: __13____ cm,
b. Actual length: __ 11____ cm,

Explanation:
First, estimated the length of each line in centimeters using
mental benchmarks.
Then, measured each line with a centimeter ruler to find
the actual length so a. Estimate: __13___ cm,
b. Actual length: __ 11__ cm.

Question 4.
_____________________________________
a. Estimate: __6___ cm
b. Actual length: ___8___ cm
a. Estimate: __6___ cm,
b. Actual length: __ 8___ cm,

Explanation:
First, estimated the length of each line in centimeters using
mental benchmarks.
Then, measured each line with a centimeter ruler to find
the actual length so a. Estimate: __6__ cm,
b. Actual length: __ 8__ cm.

Question 5.
_____________________________________
a. Estimate: ___6___ cm
b. Actual length: ___5___ cm
a. Estimate: __6__ cm,
b. Actual length: __5__ cm,

Explanation:
First, estimated the length of each line in centimeters using
mental benchmarks.
Then, measured each line with a centimeter ruler to find
the actual length so a. Estimate: __6__ cm,
b. Actual length: __5__ cm.

Question 6.
Circle the correct unit of measurement for each length estimate.
a. The height of a door is about 2 (centimeters/meters) tall.
What benchmark did you use to estimate? _____2 meters__________ Explanation:
If we measure the height off the door in centimeres the
value will be very big, So the appropriate and easy measure
is meters. Therefore the height of a door is about 2 meters tall.

b. The length of a pen is about 10 (centimeters/meters) long.
What benchmark did you use to estimate? _10 centimeters _ Explanation:
If we use meters as our benchmark the value will be very small
so the appropriate value to measure is centimeters.
Therefore the length of a pen is about 10 centimeters long.

c. The length of a car is about 4 (centimeters/meters) long.
What benchmark did you use to estimate? ______4__meters____ Explanation:
If we measure the length of the car in centimeters the value
will be very big, so it is approriate to use meters as our measure.
Therefore the length of a car is about 4 meters long.

d. The length of a bed is about 2 (centimeters/meters) long.
What benchmark did you use to estimate? _____2 meters_______ Explanation:
If we use centimeters as our benchmark the value will be very
small so the appropriate value to measure is meters. Therefore
the length of a bed is about 2 meters long.

e. The length of a dinner plate is about 20 (centimeters/meters) long.
What benchmark did you use to estimate? ___20 centimeters___ Explanation:
If we use meters as our benchmark the value will be very small
so the appropriate value to measure is centimeters.
Therefore the length of a dinner plate is about 20 centimeters long.

Question 7.
Use an unsharpened pencil to estimate the length of 3 things in your desk.
a. _______Pencil Box______ is about __25__ cm long.
Pencil Box is about 25 cm long,

Explanation:
The estimated length of Pencil Box is about 25 cm long.

b. ______Crayon Box______ is about ___10___ cm long.
Crayon Box is about 10 cm long,

Explanation:
The estimated length of Crayon Box is about 10 cm long.

c. ______Eraser______________ is about ___3____ cm long.
Eraser is about 3 cm long,

Explanation:
The estimated length of Eraser is about 3 cm long.

Eureka Math Grade 2 Module 2 Lesson 5 Exit Ticket Answer Key

Question 1.
Circle the most reasonable estimate for each object.
a. Length of a push pin                              1 cm or 1 m Length of a push pin is 1 cm,

Explanation:
Circled the most reasonable estimate for
length of a push pin is 1 cm.

b. Length of a classroom door                   100 cm or 2 m Length of a classroom door is 2m,

Explanation:
Circled the most reasonable estimate for
length of a classroom door is 2m,

c. Length of a pair of student scissors         17 cm or 42 cm Length of a pair of student scissors 17 cm,

Explanation:
Circled the most reasonable estimate for
length of apair of student scissors 17 cm.

Question 2.
Estimate the length of your desk. (Remember,
My desk is about __80___ cm long.
My desk is about 80 cm long,

Explanation:
Estimated the length of my desk the width is

Question 3.
How does knowing that an unsharpened pencil is about
__________________________________________________________
__________________________________________________________
Estimating the length of my arm from my elbow to my wrist is 60 cm,

Explanation:
By measuring and estimating the length of my arm from my
elbow to my wrist is 60 cm.

Question 1.
Name five things in your home that you would measure in meters.
Estimate their length.
Remember, the length from a doorknob to the floor is about 1 meter.

 Item Estimated Length a.                         Sofa 1 meter b.                       Fridge 2 meters c.                       Alimarah 1 meter d.                      Study Table 1 meter e.                     Entrance Door 2 meters

a. Sofa – 1 meter,
b. Fridge – 2 meters,
c. Alimarah –  1 meter,
d. Study Table – 1 meter,
e. Entrance  Door – 2 meters,

Explanation:
Named five things in my home that would measure in meters.
Estimated their lengths as
a. Sofa – 1 meter,
b. Fridge – 2 meters,
c. Alimarah –  1 meter,
d. Study Table – 1 meter,
e. Entrance  Door – 2 meters.

Question 2.
Choose the best length estimate for each object.
a. Whiteboard             3 m or 45 cm
Whiteboard is 45 cm,

Explanation:
The best length of Whiteboard is 45 cm.

b. Banana                    14 cm or 30 cm
Banana is 14 cm,

Explanation:
The best length of Banana is 14 cm.

c. DVD                        25 cm or 17 cm
DVD is 17 cm,

Explanation:
The best length of DVD is 17 cm.

d. Pen                         16 cm or 1 m
Pen is 16 cm,

Explanation:
The best length of Pen is 16 cm.

e. Swimming pool      50 m or 150 cm
Swimming pool is 50 m,

Explanation:
The best length of Swimming pool is 50 m.

Question 3.
Measure the length of the lines using your pinky finger.
a. Line A _______________________
Line A is about ___12______ cm long.
Line A is about 12 cm long,

Explanation:
The estimate of Line A is about 12 cm long.

b. Line B ____
Line B is about ____2_____ cm long.
Line B is about 2 cm long,

Explanation:
The estimate of Line B is about 2 cm long.

c. Line C ___________________________________________
Line C is about _____20____ cm long.
Line C is about 20 cm long,

Explanation:
The estimate of Line C is about 20 cm long.

d. Line D __________________________________
Line D is about ____15_____ cm long.
Line D is about 15 cm long,

Explanation:
The estimate of Line D is about 15 cm long.

e. Line E _______________
Line E is about ____5_____ cm long.