Question

Estimate 20 plus negative 3.05 plus negative 9.8

Answer 1

20-3.05-9.8=estimated is 7
the answer is 7
hope this helps!

Answer 2

Estimate.

20+(-3.05)+(-9.8)

A positive and a negative are negative.

20-3.05-9.8

Since it said to estimate, I am going to put 3.05 as 3.10, and 9.8 as 10.

20-10=10

10-3.10= 7.90

If we wanted an exact answer, I would add .15 since we added it to the difference to make it easier to solve.

7.90+.15= 8.05

I hope this helps!
~cupcake