Final answer:
To subtract the fraction 3/10 from 1, express 1 as 10/10 and perform the subtraction: 10/10 - 3/10 = 7/10. When subtracting time, subtract the smallest units first and borrow from larger units if needed. Convert units of time by dividing the number of seconds by 60 for minutes, or by 3600 for hours.
Step-by-step explanation:
Subtracting Whole Numbers and Fractions
To solve the problem of subtracting the fraction 3/10 from the whole number 1, you should first express the whole number as a fraction with the same denominator. So, 1 can be expressed as 10/10. Now you have two fractions with the same denominator, which makes subtraction straightforward:
10/10 - 3/10 = (10 - 3)/10 = 7/10
The difference is 7/10, written as a fraction.
Subtracting Units of Time
1 hour 75 minutes - 20 minutes = 1 hour 55 minutes
2 hour 10 minutes - 20 minutes = 1 hour 50 minutes
Converting Units and Fractional Units of Time
360 minutes = 6 hours (360/60)
To subtract measures of time effectively, it's often necessary to borrow from the larger unit and then simplify the answer, converting the units as needed. A solid understanding of arithmetic and fraction operations can be built upon natural intuition to verify and create the correct rules for handling fractions.