Answer:
Part A - 0.21 and 0.22 are two decimals greater than Luke's decimal and less than Bekka's decimal.
Part B - 0.2 and 0.200 are two decimals equivalent to Luke's decimal.
Explanation:
Given : Luke shaded 20 squares on his hundredths grid. Bekka shaded 30 on her hundredths grid.
To find :
PART A- Write two decimals greater than Luke's decimal and less than Bekka's decimal.
PART B- Write two decimals equivalent to Luke's decimal.
Solution :
Luke shaded 20 squares on his hundredths grid.
i.e.

Bekka shaded 30 on her hundredths grid.
i.e.

Part A- Two decimals greater than Luke's decimal and less than Bekka's decimal.
i.e.

Between 0.20 and 0.30 the two decimals are 0.21 and 0.22.
Therefore, 0.21 and 0.22 are two decimals greater than Luke's decimal and less than Bekka's decimal.
Part B - Two decimals equivalent to Luke's decimal.
Luke's decimal is 0.20.
0.2 is equivalent to 0.20.
0.200 is equivalent to 0.20.
Therefore, 0.2 and 0.200 are two decimals equivalent to Luke's decimal.