subtraction

Act to Subtract

Subtraction Strategies

Multiple Select

When we add to subtract, which number do we start with?

• the greater number because we are counting back.

• the lesser number because we are adding up.

• it doesn't matter when you subtract.

Multiple Choice

When we count back to subtract, we start with the

• The higher number because we count back.

• The lower number because we count up.

• it doesn't matter in subtraction.

Multiple Choice

When subtracting by stacking, which number goes on top?

• The largest number because it is what you are subtracting.

• Whichever number has the largest ones place.

• It doesn't matter.

Multiple Choice

What is 421-300?

• 300

• 100

• 121

Multiple Choice

What is 560-243

• 317

• 323

• 300

Multiple Choice

Which number goes on top if you subtract by stacking and use place value? 721-456?

• 456

• 721

• it doesn't matter

Multiple Choice

When counting up to subtract, which number goes on the numberline first in the problem 623-133?

• 133

• 623

• it doesn't matter

Multiple Choice

When counting back on an open number line, which number do you start with in the problem 765-700?

• 700

• 765

• it doesn't matter

Poll

On a scale: how do you feel about subtracting on a number line?

• 4- I can teach someone

• 3- I understand well

• 2- I need some help

• 1- I don't get it at all

Poll

On a scale, how do you feel about subtracting with regrouping using the stacked method?

• 4- I can teach someone

• 3- I understand

• 2- I still make mistakes

• 1- I need help