Decimal Addition and Subtraction

What is Erica doing wrong?

• Nothing - trick question - that's how we subtract!

• She forgot to put the decimal point!

• She didn't line up the decimal points!

• She is starting her problem from the wrong side!

Tags

CCSS.5.NBT.B.7

What IS the CORRECT answer to the problem Erica is tackling? Use the Count UP strategy or your whiteboard.

• 6.0

• 3.4

• 2.6

• 3.6

Tags

CCSS.5.NBT.B.7

What is Marcos doing wrong?

• Nothing - Marcos is right; the answer is 62

• Marcos forgot to put the decimal point! The answer is 6.2

• Marcos is adding in the wrong direction! The 1 goes over the 5.

• Marcos is WRONG - 2 + 3 = 5

Tags

CCSS.6.NS.B.3

What is Charlie doing wrong here?

• When Charlie added 5 + 5, he should put the 1 above the 3.

• Charlie forgot to put the decimal point.

• Nothing - 6.10 is the correct answer!

• He added in the wrong direction. There should be a 6 above the 5.

Tags

CCSS.5.NBT.B.7

What IS the CORRECT answer to this problem - help Charlie out!

• 6.10 is the correct answer.

• You subtract and get 0.0

• 7.0

• 6.0

Tags

CCSS.5.NBT.B.7

What mistake is Alana making?

• None - the answer is 57,553!

• She started adding the decimals on the WRONG side.

• She didn't LINE UP the decimal points first.

• She started adding on the wrong side - it should say 0 first!

Tags

CCSS.6.NS.B.3

4.5 + 3.2 =

• 7.77

• 77

• 7.7

• 0.77

Tags

CCSS.6.NS.B.3

Match the following

• .

• Ones

• 5 pennies

• TentTHS

• $5

• Tens

• $50

• HundredTHS

• 5 dimes

• Decimal Point

Tags

CCSS.5.NBT.A.3A

Which of these equal 3.5 - SELECT ALL CORRECT

• 3 + 0.5

• 2.2 + 1.3

• three and five tenths

• 4.0 - 0.5

Tags

CCSS.5.NBT.B.7

The first thing to do when adding or subtracting decimal numbers is to ____ up the decimals.

Tags

CCSS.5.NBT.B.7