Question

Which is the best estimate for the product of 1,903.003 × 198.7?









A.

4,000,000








B.

400,000








C.

40,000








D.

4,000

Answer 1

1,903.003 × 198.7
when I estimate, I change the numbers they gave me to something I can work with:

1903.003 is close to
2000 so i'll make it 2000

198.7 is close to
200, so i'll make it 200

so,
1,903.003 × 198.7 becomes
2000 X 200

count the number of zeros found in 2000 X 200, write that many zeros after the product of 2*2

make sense how to do this?

Answer 2

so it is D.?