This is a chart about the children of five families
CHILDREN OF FIVE FAMILY
This chart has two columns:
- The left column lists the names of the families.
- The right column shows the number of children, number of sons, number of daughters of each family,
Looking at the chart we know:
- The five families listed on the chart are: Ms. Mai’s family, Ms. Lan’s family, Ms. Hong’s family, Ms. Dao’s family, and Ms. Cuc’s family.
- Ms. Mai’s family has two daughters, Ms. Lan’s family has 1 son, …
1.2. Charts (continued)
Below is a chart showing the number of rats that four villages have eliminated:
- The bottom row shows the names of the villages.
- The numbers are on the left side of the mouse stats chart.
- Each column represents the number of rats that village has killed.
- The number recorded at the top of the column indicates the number of mice represented in that column.
The chart above tells us:
- Four villages are named on the chart: Dong, Doai, Trung, Thuong.
- The number of mice that have been eliminated in Dong village is 2,000, 2,200 in Doai, 1600 in Trung and 2750 in Thuong.
- Taller columns represent more. The lower column represents fewer mice.
1.3. Textbook exercise solution page 29
Lesson 1: The chart below shows the sports that fourth grade participates in
Look at the chart and answer the following questions:
a) What classes are listed in the diagram?
b) How many sports does the fourth grade participate in, including which ones?
c) How many classes are there in swimming, which classes?
d) Which subject has the least attendance?
e) How many subjects did two classes 4B and 4C participate in in all? What sports did the two classes participate in?
- Observe the chart to answer the problem questions.
a) The classes named in the chart are: class 4A, class 4B, class 4C.
b) Grade Four participates in 4 sports: swimming, skipping rope, chess and shuttlecock.
c) Swimming has two participating classes, class 4A and class 4C.
d) Chess has the fewest classes, only class 4A participates.
e) Two classes 4B and 4C participated in all 3 subjects: swimming, jumping rope and shuttlecock.
Both classes participated in soccer.
Lesson 2: The chart below shows the amount of rice that Uncle Ha’s family harvested in three years: 2000, 2001, 2002. Based on the graph, answer the questions below:
a) How many tons of rice did Ha’s family harvest in 2002?
b) How many quintals of rice did Ha’s family harvested in 2002?
c) How many tons of rice did Ha’s family harvest in 3 years? Which year has the most harvest? Which year has the least harvest?
- Look at the chart to find the number of rice that Mr. Ha’s family can harvest each year.
a) The amount of rice that Uncle Ha’s family harvested in 2002 is:
10 x 5 = 50 quintals = 5 tons
b) The amount of rice that Uncle Ha’s family harvested in 2000 is:
10 x 4 = 40 quintals = 4 tons
In 2002, Uncle Ha’s family harvested more than in 2000
50 – 40 = 10 quintals
c) The amount of rice that Uncle Ha’s family harvested in 2001 is:
10 x 3 = 30 quintals
In all 3 years, Uncle Ha’s family harvested the amount of rice:
40 + 30 + 50 = 120 quintals = 12 tons
We have: 30 quintals < 40 quintals < 50 quintals
So in 2002, the most rice was harvested; 2001 harvested the least amount of rice.
1.4. Solve textbook exercises pages 31, 32
Lesson 1: The chart below shows the number of trees planted by Grade 4 and Grade 5
Look at the chart above and answer the following questions:
a) Which classes participate in tree planting?
b) How many trees can Class 4A grow? How many trees can class 5B plant? How many trees can class 5C grow?
d) How many classes can grow more than 30 trees, which ones?
e) Which class can plant the most trees? Which class can plant the fewest trees?
- Look at the graph to find the number of trees each class can grow, then answer the math questions.
- The number at the top of the column shows the number of trees that each class can grow.
a) The classes involved in tree planting are: 4A, 4B, 5A, 5B, 5C.
b) Class 4A can plant 35 trees, Class 5B can plant 40 trees. Class 5C planted 23 trees.
c) The fifth grade has 3 planting classes: 5A, 5B and 5C.
d) There are three classes that can grow more than 30 trees: class 4A, class 5A, class 5B.
e) Class 4B can plant 28 trees, Class 5A can plant 45 trees.
We have: 23 < 28 < 35 < 40 < 45.
So: class 5A planted the most trees; class 5C planted the fewest trees.
Lesson 2: The number of grades One at Hoa Binh Primary School in four school years is as follows
2001 – 2002 school year: 4 classes
School year 2002 – 2000: 3 classes
2003 – 2004 school year: 6 classes
2004 – 2005 school year: 4 classes
a) Fill in the dots in the chart below:
b) Based on the chart above, answer the following questions:
– How many more classes in the 2003 – 2004 school year than in the 2002 – 2003 school year?
– School year 2002 – 2003 each class has 35 students. How many first grade students did Hoa Binh Primary School have in that school year?
– If the 2004 – 2005 school year has 32 students in each first grade, how many students in the first grade in the 2002 – 2003 school year is less than the 2004 – 2005 school year?
- Use the given data to complete the chart.
- Observe the chart to answer the problem questions.
a) Fill in from left to right:
– Column vertices: 4, 6, 4.
– Pillars: 2002 – 2003, 2004 – 2005.
b) More first graders in the 2003 – 2004 school year than in the 2002 – 2003 school year are:
6−3 = 3 (class)
– Number of first grade students in the 2002 – 2003 school year of Hoa Binh primary school is:
35×3 = 105 (students)
– Number of first grade students in the 2004 – 2005 school year of Hoa Binh primary school is:
32×4 = 128 (student)
– The number of first grade students in the 2002 – 2003 school year is less than that of the 2004 – 2005 school year:
128−105 = 23 (students)