Solving exercises on page 22 of Math 3 Workbook Volume 1, book 'Horizon of Creativity'

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Solving Math 3 page 22 Workbook Volume 1 'Horizon of Creativity'
 

Solving exercises on page 22 of Math 3 Workbook Volume 1, book 'Horizon of Creativity':

Mi-li-meters

1. Solve exercise 1 Page 22 Math Grade 3

Problem: Number ?
a) 1 cm = ..... mm                                   b) 30 mm = .... cm
5 cm = ..... mm                                           80 mm = ...... cm

Guidance: Apply the knowledge 1 cm = 10 mm, 10mm = 1 cm to fill in the appropriate numbers in the blanks.

Answer:
a) 1 cm = 10 mm                                      b) 30 mm = 3 cm
5 cm = 50 mm                                               80 mm = 8 cm

2. Solve exercise 2 Page 22 Math Grade 3

Problem: Number?

Guidance:
- Convert to the same unit of measurement.
- To find the unknown term, subtract the given term from the sum.

Answer:
a, We have 1 cm = 10 mm
10 mm - 3 mm = 7 mm
So, 3 mm + 7 mm = 1 cm

b, We have 3 cm = 30 mm
30 mm - 16 mm = 14 mm
So, 16 mm + 14 mm = 3 cm

3. Solve exercise 3 Page 22 Math Grade 3

Problem: Substitute? with mm, cm, dm, or m?
a, The pencil is approximately 15 cm long.
b, The street lamp post is about 8 m tall.
c, The thickness of Math 3 book is about 5 mm.
d, Teacher's glove is approximately 2 dm long.

Guidance: Observe real-life objects and estimate their measurements.

Answer:
a, The pencil is approximately 15 cm long.
b, The street lamp post is about 8 m tall.
c, The thickness of Math 3 book is about 5 mm.
d, Teacher's glove is approximately 2 dm long.

Problem: Is the length of this ant larger, smaller, or equal to 1 cm?
Estimate then measure to check.

Guidance:
+) Observe the image then estimate the length of the ant.
+) Measure the length of the ant to check if the estimate is correct.

Answer:
Estimation: the length of this ant is larger than 1 cm.
Using a ruler to check: The length of the ant is equal to 1 cm.

4. Solve exercise 4 Page 22 Math Grade 3

By solving exercises on page 22 of the Math 3 Workbook Volume 1, book 'Horizon of Creativity,' students have learned how to solve exercises in the book as well as understand the lesson of Mi-li-meters, effectively reinforcing their knowledge.