Solving Equations with Decimals

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Solving Equations with Decimals - PowerPoint PPT Presentation

Solving Equations with Decimals . 3.5. Estimating Answer to Check. Rounding decimals 5 and above round up 4 and below keep the same Tenths- 1 decimal place Hundredths-2 decimal places Thousandths- 3 decimals places. Round to the nearest hundredths.

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Presentation Transcript

Solving Equations with Decimals

3.5

Rounding decimals

• 5 and above round up
• 4 and below keep the same
• Tenths- 1 decimal place
• Hundredths-2 decimal places
• Thousandths- 3 decimals places
Round to the nearest hundredths
• Look at the third decimal place to determine
Examples:
• 23.874
• 450.0982
• Line up the decimal place vertically
• When subtracting put larger number on top
Ex: Add or Subtract and round to nearest hundreths

1.) 0.345 – (-34.1)

2.) 0.86 + (-8.2)

Solving 1 Step Equations with APE of decimals
• KFC
• Add the additive inverse of the number being added to the variable to both sides of the equation
• Remember to line up decimals and put bigger number on top
Ex: 3.8 =n-3.62

Estimate

Solve

Ex: -22 =p+13.7

Estimate

Solve

Ex: 117.345+m=200

Estimate

Solve

Homework

Worksheet