Solving Math 3 Workbook Volume 1, Cánh Diều Book, Pages 91-92

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Solving Grade 3 Math on pages 91 and 92 of Cánh Diều book, Volume 1

Solving problems on pages 91 and 92 of Math 3 Workbook Volume 1, Cánh Diều book:

Calculating the value of numerical expressions (continued)

1. Solve Exercise 1 on Page 91 of Grade 3 Math Workbook

2. Solve Exercise 2 on Page 92 of Grade 3 Math Workbook

3. Solve Exercise 3 on Page 92 of Grade 3 Math Workbook

4. Solve Exercise 4 on Page 92 of Grade 3 Math Workbook

5. Solve Exercise 5 on Page 92 of Grade 3 Math Workbook

Unlock the secrets of solving problems on pages 91 and 92 of Math 3 Workbook Volume 1, Cánh Diều book. A valuable guide to detailed solutions for exercises 1, 2... in the lesson on Evaluating the value of numerical expressions (continued). Students, enhance your math-solving skills with this resource.

Solving Grade 3 Math on pages 91 and 92 of Cánh Diều book, Volume 1

Solving problems on pages 91 and 92 of Math 3 Workbook Volume 1, Cánh Diều book:

Calculating the value of numerical expressions (continued)

1. Solve Exercise 1 on Page 91 of Grade 3 Math Workbook

Problem: Calculate.

a) 7 + 43 x 2 b) 8 + 15 : 5
c) 312 x 2 - 5 d) 900 : 3 - 20

Solution Guide: If the expression involves addition, subtraction, multiplication, and division, perform multiplication and division first, followed by addition and subtraction.

Answer:
a) 7 + 43 x 2 = 7 + 86
= 93
The value of the expression 7 + 43 x 2 is 93.

b) 8 + 15 : 3 = 8 + 5
= 13
The value of the expression 8 + 15 : 3 is 13.

c) 312 x 2 - 5 = 624 - 5
= 619
The value of the expression 312 x 2 - 5 is 619.

d) Incorrect.
300 - 100 : 5 = 300 - 20
= 280

2. Solve Exercise 2 on Page 92 of Grade 3 Math Workbook

Problem: What is the value of each number in the flower?

Solution Guide:
- If the expression involves addition, subtraction, multiplication, and division, perform multiplication and division first, followed by addition and subtraction.
- If the expression only contains addition and subtraction operations, perform them from left to right.

Answer:

Our selection is as follows:

3. Solve Exercise 3 on Page 92 of Grade 3 Math Workbook

Problem: Check the calculation of the values of the following expressions, correct them if wrong:

Solution:
- If the expression contains only addition and subtraction operations, perform them from left to right.
- If the expression contains addition, subtraction, multiplication, and division operations, perform multiplication and division first, then perform addition and subtraction.

Answer:
a) Incorrect.
Correction:
50 + 50 x 8 = 50 + 400
= 450

b) Correct.

c) Correct.

d) Incorrect.
Correction:
300 - 100 : 5 = 300 - 20
= 280

Explore exercises from 1 to 4 in Math 3 Workbook Volume 1 on page 94, Cánh Diều book, part of the lesson on Evaluating the value of numerical expressions (continued). Mytour has provided detailed guidance in the article Solving exercises on page 94 of Math 3 Workbook Volume 1, Cánh Diều. Students can check it out.

See more: Solving exercises on page 94 of Math 3 Workbook Volume 1, Cánh Diều

4. Solve Exercise 4 on Page 92 of Grade 3 Math Workbook

Problem: Each sack of rice weighs 20 kg, each sack of corn weighs 30 kg. How much does 4 sacks of rice and 1 sack of corn weigh in kilograms?
Answer:
The weight of 4 sacks of rice is
20 x 4 = 80 (kg)
The weight of 4 sacks of rice and 1 sack of corn is
80 + 30 = 110 (kg)
Answer: 110kg

Solution:
- Step 1: Calculate the weight of 4 sacks of rice by multiplying the weight of one sack of rice by 4.
- Step 2: Find the weight of 4 sacks of rice and 1 sack of corn = Weight of 4 sacks of rice + Weight of 1 sack of corn

Answer:
The weight of 4 sacks of rice is
20 x 4 = 80 (kg)
The weight of 4 sacks of rice and 1 sack of corn is
80 + 30 = 110 (kg)
Answer: 110kg

5. Solve Exercise 5 on Page 92 of Grade 3 Math Workbook

Problem: Write the following expressions and then calculate the value of each expression:
a) Subtract 7 from 87 and then add 40.
b) Multiply 7 by 6 and then subtract 2.
Solution Guide:
- Step 1: Write down the expressions.
- Step 2: Calculate the value of the expressions:
+ If the expression only contains addition and subtraction operations, perform them from left to right.
+ If there are addition, subtraction, multiplication, and division operations in the expression, perform multiplication and division first, then perform addition and subtraction.

Solution:
- Step 1: Write down the expressions.
- Step 2: Calculate the value of the expressions:
+ If the expression only contains addition and subtraction operations, perform them from left to right.
+ If there are addition, subtraction, multiplication, and division operations in the expression, perform multiplication and division first, then perform addition and subtraction.

Answer:
a) 87 - 7 + 40 = 80 + 40
= 120

b) 7 x 6 - 2 = 42 - 2
= 40

Solutions for exercises on pages 91 and 92 of Grade 3 Math Workbook, Cánh Diều book, have been shared here. Compare and cross-reference with the answers provided. Learn the solution methods to improve your math skills.

Frequently Asked Questions

What are the main steps for solving problems in Math 3 Workbook?

To solve problems in the Math 3 Workbook, you should first identify the operations involved. Perform multiplication and division before addition and subtraction, following the order of operations to ensure accurate results.

How can students improve their math-solving skills using the Cánh Diều book?

Students can enhance their math-solving skills by practicing exercises from the Cánh Diều book. The detailed solutions provided for various problems help reinforce learning and clarify the methods used in solving each exercise.

What is the correct process for calculating numerical expressions in grade 3 math?

The correct process for calculating numerical expressions involves applying the order of operations. Start with multiplication and division, then proceed to addition and subtraction, ensuring accurate evaluation of the expressions.

Is it important to cross-reference answers when solving math problems?

Yes, it is important to cross-reference answers when solving math problems. This practice helps students identify errors, understand solution methods, and reinforces learning through comparison with accurate solutions.

What is the total weight of 4 sacks of rice and 1 sack of corn?

The total weight of 4 sacks of rice and 1 sack of corn is 110 kilograms. This is calculated by multiplying the weight of each sack of rice by 4 and adding the weight of 1 sack of corn.

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