Solving exercises on pages 70 and 71 of Math 3 Workbook Volume 1, the book Connecting Knowledge with Life

For additional reference materials for Math 3:
- Check out the complete set of Solving Math 3 Connecting Knowledge with Life
- Solving Math 3 on page 39 of Creative Horizon Book 1 - What can you accomplish?
- Solving Math 3 on pages 50 and 51 of Kite Book 1 - Multiplication table by 9

Solving Math 3 on pages 70 and 71 of the book Connecting Knowledge with Life
 

Solving exercises on pages 70 and 71 of Math 3 Workbook Volume 1, the book Connecting Knowledge with Life:

Folding a number multiple times

Activity

1. Solve Exercise 1 on Page 70 of Math 3 Workbook

Problem: Number?

Solution Guide:
- To add 8 units to the given number, add 8 to that number.
- To multiply a number by 8, multiply the number by 8.

Answer:

2. Solve Exercise 2 on Page 70 of Math 3 Workbook

Problem: Number?

Solution Guide:
- To add one unit to the given number, add that number to one unit.
- To multiply a number by a certain number of times, multiply the number by that number of times.

Answer:

3. Solve Exercise 3 on Page 70 of Math 3 Workbook

Problem: A child is 9 years old, and the father is 4 times older than the child. Find the father's age this year.

Solution: To find the father's age, multiply the child's age by 4.

Answer:
The father's age this year is:
                  9 x 4 = 36 (years)
                            Answer: 36 years.

Practice

1. Solve Exercise 1 Page 71 Math Book Grade 3

Problem: Number?

Solution:
- To multiply a number by a certain factor, multiply the number by that factor.
- To add a single digit to a given number, add the number to the single digit.

Answer:

2. Solve Exercise 2 Page 71 Math Book Grade 3

Problem: D, S?

Solution:
Step 1: Mentally calculate the results of the operations.
- To multiply a number by a certain factor, multiply the number by that factor.
- To add a single digit to a given number, add the number to the single digit.
Step 2: Compare with the result and draw a conclusion. Write D for correct, S for incorrect.

Answer:

3. Solve Exercise 3 Page 71 Math Book Grade 3

Problem: In a room, there are 9 tables. Nam wants to place two chairs at each table. How many chairs does Nam need?

Solution: The number of chairs Nam needs to arrange = Number of chairs per table x Number of tables.

Answer:
Nam needs to arrange the number of chairs:
             2 x 9 = 18 (chairs)
                       Answer: 18 chairs

4. Solve Exercise 4 Page 71 Math Book Grade 3

Problem: Find the path through the maze to reach the castle using calculations with a result of 45.

Solution:
- Step 1: Perform calculations to find results.
- Step 2: Determine the path through the maze based on calculations with a result of 45.

Answer:
23 x 2 = 46                                        15 x 3 = 45
45 + 7 = 52                                         75 - 20 = 55
16 x 2 = 32                                         75 - 45 = 30
9 x 5 = 45                                           75 - 30 = 45

So the path to the castle is as follows:

Solving exercises on pages 70, 71 Math Book Grade 3 Volume 1, Connecting knowledge with life has guided students in solving exercises 1, 2 in the lesson Multiplying a number by a certain factor. Students can refer to make the exercises easier.