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Step-by-step guide to solve Exercise 2 on page 137 of Math Grade 5 textbook
Problem statement:
Calculate:
a) (3 hours 40 minutes + 2 hours 25 minutes) x 3;
b) 3 hours 40 minutes + 2 hours 25 minutes x 3;
c) (5 minutes 35 seconds + 6 minutes 21 seconds) : 4 ;
d) 12 minutes 3 seconds x 2 + 4 minutes 12 seconds : 4.
Solving Approach:
Students execute calculations following standard rules:
- For expressions with addition and subtraction or multiplication and division, perform from left to right.
- For expressions with both addition/subtraction and multiplication/division, perform multiplication/division first, then addition/subtraction.
- For expressions with parentheses, perform calculations inside the parentheses first, then outside the parentheses.
Answers
a) (3 hours 40 minutes + 2 hours 25 minutes) x 3
= 5 hours 65 minutes x 3 (65 minutes = 1 hour 5 minutes)
= 6 hours 5 minutes x 3
= 18 hours 15 minutes.
b) 3 hours 40 minutes + 2 hours 25 minutes x 3
= 3 hours 40 minutes + 6 hours 75 minutes (75 minutes = 1 hour 15 minutes)
= 3 hours 40 minutes + 7 hours 15 minutes
= 10 hours 55 minutes.
c) (5 minutes 35 seconds + 6 minutes 21 seconds) : 4
= 11 minutes 56 seconds : 4
= 2 minutes 59 seconds.
d) 12 minutes 3 seconds x 2 + 4 minutes 12 seconds : 4
= 24 minutes 6 seconds + 1 minute 3 seconds
= 25 minutes 9 seconds.
Here is the guide to solve exercise 2 on page 137 of Math Grade 5, focusing on concentrated practice. Additionally, this section contains 3 more exercises: Solving exercise 1 on page 137 of Math Grade 5, Solving exercise 2 on page 137 of Math Grade 5, Solving exercise 3 on page 137 of Math Grade 5, and Solving exercise 4 on page 137 of Math Grade 5. Let's explore the guide on Solving Math Grade 5 page 137 to excel in the subject of Math Grade 5.
