Buzz
Solve Grade 5 math on page 55 of VBT workbook 2, Multiply time measurements by a number, exercise 126 is a detailed guide to solving exercises 1, 2, 3 closely following the learning content. Students can refer to consolidate and grasp the knowledge as well as the method of solving the type of problem of multiplying time measurements by a number.
Solve grade 5 math on page 55 of VBT workbook 2, Multiply time measurements by a number, exercise 126
1. Solve exercise 1 - Workbook grade 5 math exercise 2 page 55
Problem Statement:
Calculate:
Solution Method:
- Align the numbers vertically and perform the calculation as with multiplying natural numbers.
- When calculating, after each result, we must write the corresponding unit of measurement.
- If the time measurement is in a smaller unit that can be converted to a larger unit, then we should convert it to a larger unit.
Answer
2. Solve exercise 2 - Workbook grade 5 math exercise 2 page 55
Problem Statement:
In one week, Mai attends 25 classes, each lasting 40 minutes. How much time does Mai spend in class over 2 weeks?
Solution Method:
- Calculate the number of classes in 2 weeks = number of classes in 1 week x 2.
Calculate the time Mai spends at school over 2 weeks = time for 1 class x number of classes over 2 weeks.
Answer
The number of classes Mai attends over 2 weeks is :
25 ⨯ 2 = 50 (classes)
Mai spent 50 periods studying:
50 ⨯ 40 = 2000 (minutes)
2000 minutes = 33 hours 20 minutes
Answer: 33 hours 20 minutes
3. Solving problem 3 - Math exercise book for grade 5 exercise 2 page 55
Problem:
A machine can pack 60 boxes every 5 minutes. How long does it take for the machine to pack 12000 boxes?
Solution method:
- Find the number of boxes the machine can pack in 1 minute = number of boxes the machine can pack in 5 minutes : 5.
- Find the time for the machine to pack 12,000 boxes = 12,000 boxes : number of boxes the machine can pack in 1 minute.
Answer
In 1 minute, the machine can pack the number of boxes:
60 : 5 = 12 (boxes)
The time it takes the machine to pack 12000 boxes is:
12,000 : 12 = 1000 (minutes)
1000 minutes = 16 hours 40 minutes
Answer: 16 hours 40 minutes.
You are viewing the guide to Solve math problems for grade 5 page 55 VBT exercise 2 Multiplying time measurements by a number exercise 126, you can review the guide to Solve math problems for grade 5 page 53, 54 VBT exercise 2 Practice or preview the guide to Solve math problems for grade 5 page 56, 57 VBT exercise 2 Divide time measurements by a number to understand more about the lesson.
Wishing you all success in learning math.
