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Solving Math problems for Grade 3 on page 75 of Workbook 2, Winged Kite
Solving exercises on page 75 of Math 3 Workbook 2, Winged Kite:
Concentration Practice
1. Solve Exercise 1 on Page 75 of Math Textbook for Grade 3
Exercise: a) Set up then calculate.
b) Perform division then use multiplication to double-check.
Solution Guide:
a) - Arrange the numbers so that the digits in the same row are aligned.
- Perform multiplication from right to left.
b) + Set up the division.
+ Perform division from left to right.
+ Use multiplication to double-check.
Answer:
2. Solve Exercise 2 on Page 75 of Math Textbook for Grade 3
Exercise: Calculate mentally.
Solution Guide:
We can mentally calculate as follows:
+ 6,000 x 5 = ?
6 thousand x 5 = 30 thousand.
6,000 x 5 = 30,000.
Similarly for the remaining multiplications of thousands.
+ 80,000 ÷ 2 = ?
80 thousand ÷ 2 = 40 thousand
80,000 ÷ 2 = 40,000.
Similarly for the remaining divisions of thousands.
Answer:
6,000 x 5 = 30,000 80,000 ÷ 2 = 40,000 54,000 ÷ 9 = 60,000
24,000 x 4 = 96,000 100,000 ÷ 5 = 20,000 32,000 ÷ 8 = 40,000
3. Solve Exercise 3 on Page 75 of Math Textbook for Grade 3
Exercise: They install wheels on cars, each car needs to have 4 wheels. How many cars can be installed with 1,634 wheels at most, and how many wheels are left over?
Solution Guide: To answer the question, divide the number of wheels by the number of wheels each car needs.
Answer:
We have: 1,634 ÷ 4 = 408 (remainder 2)
So with 1,634 wheels, you can install a maximum of 408 cars like that and have 2 wheels left over.
- See also: Solving exercises on pages 76, 77 of Math 3 Volume 2 textbook, Winged Kite
4. Solve Exercise 4 on Page 75 of Math Textbook for Grade 3
Exercise: Observe the picture:
a) Answer the questions:
- How much do you have to pay for 6 roses?
- How much do you have to pay for 4 lilies and 5 daisies?
b) Choose the number of flowers you want to buy and then calculate the amount to be paid.
Solution Guide:
a) The amount to pay when buying 6 roses = price of one rose x 6.
The amount to pay when buying 4 lilies and 5 daisies = price of one lily x 4 + price of one daisy x 5.
b) The amount to pay = price of one flower x number of flowers.
Answer:
a) To buy 6 roses, you have to pay:
4,500 x 6 = 27,000 (dong)
To buy 4 lilies and 5 daisies, you have to pay:
15,000 x 4 + 6,000 x 5 = 90,000 (dong)
b) You choose the number of flowers you want to buy and then calculate the amount to be paid.
Example: If you buy 5 coin flowers, the amount you have to pay is:
5,300 x 5 = 26,500 (dong)
Solving exercises on page 75 of Math 3 Volume 2 textbook, Winged Kite: Concentrated Practice is a great resource for learning math. Students, refer to it together to reinforce your skills and knowledge.
