Mastering Rounding Decimals on a Number Line

What is the first step in rounding a decimal number on a number line?

• Identify the nearest whole number

• Find the midpoint

• Count by tenths

• Draw a vertical number line

Which two whole numbers does 49.985 fall between?

• 48 and 49

• 49 and 50

• 50 and 51

• 49.5 and 50.5

What is the value of each segment when rounding to the nearest whole number?

• One tenth

• One hundredth

• One whole number

• One thousandth

Why is it helpful to rewrite the number line with place values to the thousandths column?

• To make the number line longer

• To add more numbers

• To change the number

• To make it easier to see where the number falls

What is the midpoint between 49 and 50?

• 50

• 49.1

• 49.9

• 49.5

If a number is to the left of the midpoint, which direction does it round?

• Down

• Right

• Up

• Left

How does the orientation of the number line (horizontal or vertical) affect the rounding process?

• It makes rounding more difficult

• It does not change the rounding process

• It requires different midpoints

• It changes the rounding rules

What digit is in the tenths place in the number 49.985?

• 4

• 8

• 5

• 9

What is the next tenth after 49.9?

• 49.91

• 50

• 49.99

• 49.95

What is the midpoint between 49.9 and 50?

• 49.95

• 49.91

• 49.99

• 50