Quantitative practice

**Lesson 1 page 172: **Circle the word in front of the correct answer: 7m3cm = ?

A. 73cm B. 703cm C. 730cm D. 7003cm

**Solution guide:**

- Convert 7m to centimeters and add 3cm.
- Choose the correct answer from the given answers.

*Solution :*

We have: 7m 3cm = 700cm + 3cm = 703cm.

Circle the letter B.

**Lesson 2 page 173:** Look at the picture below and then answer the questions

a) How many grams do oranges weigh?

b) How many grams does a papaya fruit weigh?

c) How many grams heavier than an orange?

__Solution guide:__

- The weight of the orange is equal to the sum of the two weights on the left pan.
- The weight of the papaya is equal to the sum of the two weights on the left pan.
- Subtract the weight of the papaya from the weight of the orange.

a) Orange fruit weighs 300g (200g + 100g = 300g)

b) A papaya weighing 700g (500g + 200g = 700g)

c) A papaya is 400g heavier than an orange (700 – 300 = 400g)

**Lesson 3 page 173:**

a) Add minute hands to the clocks.

b) How many minutes does it take Lan to go from home to school?

__Solution guide:__

- Read the time when Lan started walking from home according to the standard reading.
- Determine the position of the hour and minute hands.
- Calculate the elapsed time between two times:
- How many minutes is from 7 o’clock 5 to 7 o’clock?
- From 7 o’clock to 7 o’clock 10 minutes, how many minutes have passed?
- Sum the two numbers you just found.

a) The first watch (on the left) has a 11 . minute hand

Second watch (on the right) has a 2 . index minute hand

b) Lan walks from home to school in 15 minutes.

**Lesson 4 page 173:** The vase has two bills of 2000 dong. Buy pencils 2700 VND. How much money does Binh have left?

__Solution guide:__

*Summary*

There are 2 banknotes of 2000 dong.

Buy: 2700 VND

Rest: ? copper.

- Find the amount of money Binh has: Equals the value of 2000 VND multiplied by the number of bills.
- Find the amount of money left by Binh: equal to the amount of money Binh has minus the amount used to buy pencils.

*Solution*

The amount Binh has is:

2000 x 2 = 4000 (VND)

The remaining amount of Binh is:

4000 – 2700 = 1300 (VND)

Answer: 1300 VND.

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