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Guide to solving Grade 4 Math on page 163 (Including solution methods)
1. Solving Grade 4 Math on page 163, Exercise 1
Set up and calculate:
a) 2057 x 13 428 x 125 3167 x 204
b) 7368 : 24 13,498 : 32 285,120 : 216
Solution Method:
- Set up the calculations, perform multiplication and division according to the learned theory.
Answer:
2. Solving Grade 4 Math on page 163, Exercise 2
Problem:
Find x given
a) 40 x x = 1400;
b) x : 13 = 205
Solution Method:
- Apply the theory of multiplication and division of natural numbers
+ To find the unknown factor, divide the product by the known factor
Answer:
3. Grade 4 Math Review of Operations with Natural Numbers on page 163, Exercise 3 in the textbook
Problem:
Solution Method:
Answer:
Problem:
Solution Method:
- Calculate the value of each side
- Compare the results of each side with each other
Answer:
5. Solving Grade 4 Math Review of Operations with Natural Numbers on page 163, Exercise 5 in the textbook
Problem:
A car consumes 1 liter of gas for every 112 km it travels, and the price of gas is 7,500 VND. Calculate the amount of money needed to buy gas for the car to travel a distance of 180 km.
The cost of fuel for the car to travel 1 km is:
7500 : 12 = 625 (VND)
The amount of money to buy fuel for the car to travel 180 km is:
625 x 180 = 112,500 (VND)
Answer: 112,500 VND.
Additional note: It can also be solved as follows:
The amount of fuel needed to travel 180 km is:
15 liters of fuel are needed to travel 180 km
The amount of money needed for the car to travel 180 km is:
7500 x 15 = 112,500 (VND)
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Together, we have delved into finding solutions and solving methods for 4th-grade math on page 163, reviewing the procedures of multiplication and division with natural numbers. We hope the information in this article proves beneficial to students, helping them swiftly and easily tackle exercises in the 4th-grade math textbook on page 163. Following this, students can revisit the section on Solving 4th-grade Math on pages 162, 163, reviewing operations involving natural numbers, or get a preview of the section on Solving 4th-grade Math on page 164 to enhance their grasp of 4th-grade Math.
