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Answers and detailed solutions for exercises 1, 2, 3, 4 in the exercise book on pages 45, 46 Math Workbook 2 in the document Solving 4th-grade Math problems on pages 45 and 46 of VBT Workbook 2, Practice section, exercise 124 are written closely following the curriculum to help students easily compare, contrast, and visualize the problem-solving process, enhancing their knowledge.
Solving 4th-grade math problems on pages 45 and 46 of VBT Workbook 2, Practice section, exercise 124
1. Solve exercise 1 - Math exercise book for 4th grade, Workbook 2, page 45
Problem Statement:
Calculate and then compare the result of
Solution Method:
To multiply two fractions, multiply the numerator of the first fraction by the numerator of the second fraction, and the denominator of the first fraction by the denominator of the second fraction.
Answer:
2. Solve exercise 2 - Math exercise book for 4th grade, Workbook 2, page 45
Problem Statement:
Calculate using two methods:
Solution Method:
a) Method 1: Calculate sequentially from left to right.
Method 2: Apply the associative property of multiplication:
a x b x c = a x (b x c)
b) Method 1: Calculate the expression within parentheses first, then the expression outside the parentheses.
Method 2: Apply the formula (a + b) x c = a x c + b x c.
c) Method 1: For expressions involving multiplication and addition, perform multiplication first, then perform addition.
Method 2: Apply the formula: a x c + b x c = (a + b) x c.
Answer:
3. Solve exercise 3 - Math exercise book for 4th grade, Workbook 2, page 45
Problem Statement:
Calculate using two methods: 7/5 + 4/3 + 7/5 + 4/3
Solution Method:
Continue calculating the given expressions according to the following rules:
- For expressions with parentheses, calculate within the parentheses first, then outside the parentheses.
- For expressions involving addition, subtraction, multiplication, and division, perform multiplication and division first; perform addition and subtraction later.
Answer:
4. Solving Exercise 4 - Math Workbook for Grade 4, Workbook 2, Page 46
Problem Statement:
A rectangular glass sheet has a width of 3/5 meters, and its length is twice the width. Calculate the area of that glass sheet.
Solution Method:
- To find the length of the glass sheet, multiply the width of the glass sheet by 2.
- To find the area of the glass sheet, multiply the length by the width.
Answer:
Length of the rectangular glass sheet:
3/5 x 2 = 6/5 (m)
Area of the rectangular glass sheet:
3/5 x 6/5 = 18/25 (m2)
Answer: 18/25 m2
You are currently viewing the guidance for solving 4th-grade math problems on pages 45 and 46 of VBT Workbook 2, Practice Exercise 124. You can review the solution for 4th-grade math problems on page 44 of VBT Workbook 2, Practice, or preview the guidance for 4th-grade math problems on page 46 of VBT Workbook 2. Find fractions of numbers to better understand the lesson.
Wishing you all the best in your math studies.
