Charlotte is happy because it has snowed in her town for three straight
days. On Monday, it snowed 3.56 inches. On Tuesday, it snowed 4.359
more inches. On Wednesday, it snowed 3.07 more inches. What is the
total snowfall over the three days? *

10.989

Step-by-step explanation:

This is an addition problem. We can, first, set up all our decimals in a vertical setup:

          ₁

_______________

 1 0  .  9  8   9

We get 9 for the first row because we are adding 9 + 0.

For the next row, we are adding 5 + 6 + 7.

We can break this up into 5 + 5 + 1 + 7.

Since that's just 10 + 8, our answer is 18. We carry the 1 and write the 8 .

For the third row, we can add 1 + 3 + 5 + 0. This is equivalent to 9 + 0, so our answer will be carrying a leaving a 9 in the open spot.

For our final row, we have a decimal, so we will be placing a dot.

For our numbers, we have + 4 + 3 + 3. This is 6 + 4 + , which is 10.

Since this is our last row, we do not carry, but write the number as it is.

Our answer is 10.989.