You can add them like this:
so if 156 + 213 + 109 was the equation then you would
first put them in order from biggest to smallest
213
156
+109
-----------
then add:
¹ ← ←
213 ↑
156 ↑
+109 ↑
---------↑ ( carry the 10 )
478 (add the ¹ )
then you get the answer 478!
hope that helps :)
Answer:
Sacramento is 8cm from San Francisco.
8cm in map = 91 miles
91/8 = 11.375
1cm in map = 11.375 miles
Sacramento is 7 cm away from Modesto.
7 · 11.375 = 79.625
The actual distance is 79.625 miles
Answer:
She had eaten 15 chocolates.
Step-by-step explanation:

The distribution is symmetric, I had the same exercise!!
We have (2/3)÷5 = 2/15 advertisments for 1 page;
Then, we have 98 · (2/15) = 12.2(6) advertisments for 98 pages;
The nearest whole page is 12.