# Significant Figures For 143 + 305 × 70143 + 305 × 70143 + 305 × 70

143 + 305 × 70143 + 305 × 70143 + 305 × 70 = 42820143
Sig Figs
8
Decimals
0
Scientific Notation
4.2820143 × 107

## Steps

1 305 × 70143 = 21393615 Round 21393615 → 21400000 (Sig Figs: 3) 143 + 21400000 = 21400143 305 × 70143 = 21393615 Round 21393615 → 21400000 (Sig Figs: 3) 21400143 + 21400000 = 42800143 305 × 70 = 21350 Round 21350 → 20000 (Sig Figs: 1) 42800143 + 20000 = 42820143 Round 42820143 → 42820143 (Decimals: 0)

## Instructions

To perform a calculation, simply enter your mathematical expression and press Solve.

The result along with the steps taken to reach it will appear above.

The following sig fig rules are used:

• Addition (+) and subtraction (-) round by the least number of decimals.
• Multiplication (* or ×) and division (/ or ÷) round by the least number of significant figures.
• Logarithm (log, ln) uses the input's number of significant figures as the result's number of decimals.
• Antilogarithm (n^x.y) uses the power's number of decimals (mantissa) as the result's number of significant figures.
• Exponentiation (n^x) only rounds by the significant figures in the base.
• To count trailing zeros, add a decimal point at the end (e.g. 1000.) or use scientific notation (e.g. 1.000 × 10^3 or 1.000e3).
• Zeros have all their digits counted as significant (e.g. 0 = 1, 0.00 = 3).
• Rounds when appropriate, after parentheses, and on the final step.

## How To Perform Sig Fig Calculations

Read our article on sig fig rules.

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