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Solution to exercise 1 page 138 Math textbook grade 3
Exercise:
In the span of three years, Mrs. Út's family harvested the following amounts of rice:
Year 2001: 4200 kilograms;
Year 2002: 3500 kilograms;
Year 2003: 5400 kilograms
Fill in the appropriate numbers in the blank cells in the table below:
Answer:
Solve exercise 2 on page 138 of Math 3 textbook
Problem:
Below is a statistical table showing the number of trees planted by Miss Na over 4 years:
Based on the table, answer the following questions (following the example):
a) In 2002, how many more plum trees did Miss Na plant compared to 2000?
Example:
The difference in the number of plum trees Miss Na planted in 2002 compared to 2000 is:
2165 - 1745 = 420 (trees)
b) In 2003, how many pine and plum trees did Miss Na plant altogether?
Answer:
The total number of pine and plum trees Miss Na planted in 2003 is:
2540 + 2515 = 5055 (trees)
Solve exercise 3 on page 139 of Math 3 textbook
Problem:
Observing the following data table, please circle the letter corresponding to the correct answer.
90, 80, 70, 60, 50, 40, 30, 20 , 10
a) The sequence above contains a total of:
A. 9 numbers B.18 numbers
C. 10 numbers D. 81 numbers
b) The number of fours in the sequence is:
A.4 B.0
C. 60 D. 40
Answer:
a) The sequence above contains a total of:
Answer: A. 9 numbers
b) The fourth number in the sequence is:
Answer: C. 60
Solve exercise 4 on page 139 of Math 3 textbook
Problem:
In the celebrations for Vietnamese Teacher's Day, the third-grade students achieved the following awards:
Arts: 3 first prizes and 2 third prizes
Storytelling: 2 first prizes, 1 second prize, and 4 third prizes
Chess: 1 first prize and 2 second prizes
Write the appropriate numbers in the table summarizing the awards achieved by the third-grade students (following the example):
Answer:
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