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  1. Math Calculator

    The Math Calculator will evaluate your problem down to a final solution. You can also add, subtraction, multiply, and divide and complete any arithmetic you need. Click the blue arrow to submit and see …

  2. Math Calculators

    This is a free online math calculator together with a variety of other free math calculators that compute standard deviation, percentage, fractions, and more.

  3. Sum Calculator

    Nov 4, 2025 · Use this calculator to find the sum of a data set. Enter values separated by commas or spaces. Or copy and paste lines of data from spreadsheets or text documents. See all allowable …

  4. How to solve 15 + 42 - mathsenior.com

    Finally, 15 + 42 equals 57.

  5. Problem 27 Add. $$-15+42$$... [FREE SOLUTION] | Vaia

    Determine the difference between the two numbers Since the numbers have different signs, subtract the smaller number (ignoring the sign) from the larger number to find their difference. In this case, the …

  6. Mathway | Calculators

    Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.

  7. Math Calculators

    Aug 1, 2025 · Free online calculators for math, algebra, chemistry, finance, plane geometry and solid geometry. Free online converters. Free algebra and math word problems.

  8. 15:42 Time | Conversion and Information | 24hourtime.net

    Feb 12, 2021 · Here you can find the 15:42 time equivalent in normal, regular, standard and military time, along with useful information including the conversion.

  9. What Time is 15:42? - Calculatio

    To convert 24-hour time (also known as Military Time) 15:42 to 12-hour time we need to do a few simple steps. If the number of hours of our 24-hour time is greater than 12, we need to subtract 12 from it.

  10. What time is 15:42? - Simple 24-time calculator

    We use this system throughout the world (not just the military) and leverages a 24-hour time clock rather than the 12-hour AM/PM system known to most English-speaking countries. Below are ways to …