Exploring Addition and Subtraction of Large Numbers

Where is the teacher teaching from?

• A playground

• Outer space

• A classroom

• A library

What is the first step in adding large numbers?

• Start with the ones blocks

• Trade ten ones for a tens block

• Combine the tens blocks

• Start with the hundreds

How many ones are left after trading ten ones for a tens block?

• Zero

• Three

• Ten

• One

What is the result of adding 126 and 57?

• 183

• 193

• 173

• 182

What must be done when there aren't enough ones blocks to subtract?

• Ignore the ones

• Trade a tens block for ones

• Give up

• Move to the tens place

After trading a tens block for ones, how many ones are left after subtraction?

• Seven

• Eight

• Nine

• Ten

What happens to the tens place after trading one tens block for ones?

• It disappears

• It increases

• It remains the same

• It decreases

How many tens blocks are left after subtracting five from eleven?

• Seven

• Five

• Eleven

• Six

Why do we have no hundreds block left in the subtraction problem?

• It was lost

• It was subtracted directly

• It was traded for tens

• It was never there

What is the final result of subtracting 57 from 126?

• 68

• 79

• 59

• 69