Answer:
B
Step-by-step explanation:
Answer: The second one
Step-by-step explanation:
Compatible numbers are numbers that are close in value to the actual numbers and easy to add, subtract, multiply, or divide mentally. They are useful in estimating the sum, difference, product, or quotient.
Answer:
Step-by-step explanation:
just take the numbers or letters in the middle subtract those numbers then divide it by 2