M2Topic A

What is 20x70?

• 140

• 1400

• 14000

• 140000

Why is 20 x 70 = 1400?

• because you are multiplying tens and tens which gives you hundreds

• because 2 x 7 =14

• because 20 x 7 has 2 zeros and you must use them in your answer

• i don't know

What is 20 x 700?

• 140

• 1400

• 14000

• 140000

Why is 20 x 700 = 14000?

• because you are multiplying tens and hundreds which gives you thousands

• because you are multiplying tens and tens which gives you hundreds

• because you are multiplying hundreds and hundreds which gives you ten thousands

• i don't know

What is 20 x 7000?

• 140

• 1400

• 14000

• 140000

Why is 20 x 7000 = 140,000?

• because you are multiplying tens by hundreds which gives you thousands

• because you are multiplying tens by thousands which gives you ten thousands

• because you are multiplying tens by tens which gives you hundreds

• i don't know

If a multiply a number by 100 and get 51,200, what is my original number?

• 5120

• 51200

• 512

• i don't know

What is 512 x 20?

• 1024

• 10240

• 102400

• I don't know

Round each number to estimate what a reasonable answer would be

621 x 29.

• 700 x 30 =21000

• 600 x 30 = 18000

• 600 x 20 = 12000

• I don't know

Round each number to estimate what a reasonable answer would be,

2253 x 62

• 1000 x 60 = 60000

• 2000 x 60 = 120000

• 3000 x 60 = 180000

• I don't know