Question

the answer to the calculation (21 + 10.8 + 130.363 + 24.5467) should have______number of digits after the decimal point, based on the rules for addition or subtraction. 1) 1 2) 0 3) 2 4) 4

Explanation:

Step1: Recall rule for addition/subtraction decimal places

When adding or subtracting numbers, the result should have the same number of decimal places as the number with the least number of decimal places in the terms.

Step2: Identify decimal places in each number

• \(21\): 0 decimal places (can be written as \(21.0000\))
• \(10.8\): 1 decimal place
• \(130.363\): 3 decimal places
• \(24.5467\): 4 decimal places

The number with the least number of decimal places is \(21\) (0 decimal places).

Step3: Determine the result's decimal places

Based on the rule, the sum should have 0 decimal places.

Answer:

1. 0