Difficulty: Easy
Correct Answer: 1.43
Explanation:
Introduction / Context:
The question assesses straightforward decimal subtraction, reinforcing place-value alignment and borrow logic for tenths and hundredths.
Given Data / Assumptions:
Concept / Approach:
Write the numbers one under the other with decimal points aligned. Subtract hundredths, then tenths, then the units digit, borrowing from the next left place if necessary.
Step-by-Step Solution:
Verification / Alternative check:
Think in parts: (3 + 0.57) − (2 + 0.14) = (3 − 2) + (0.57 − 0.14) = 1 + 0.43 = 1.43.
Why Other Options Are Wrong:
1.4301 and 1.403 introduce spurious digits. 1.42 and 1.44 are off by a hundredth due to a carry/borrow mistake.
Common Pitfalls:
Failing to align decimals, subtracting 14 from 57 incorrectly, or adding instead of subtracting the hundredths place.
Final Answer:
1.43
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