Answer:
Step-by-step explanation:
Lets say that I have 9.6+78.9 to estimate, we need to just calculate what it rounds up to, 9.6 rounds up to 10 and 78.9 rounds of to 79, our answer will be at round 89, this is the basic way of how to round it up. Btw the answer is 88.5
x/3 = 6/9
3 x 2 = 6
3 x 3 = 9
x = 2
6
88.90 cm
