Think how can we write 6 as in addition.

look at the pattern and notice what is the difference between the two terms and think about the next numbers in the pattern.

Think about the property of multiplication.

Use the time's table to solve the multiplication fact.

Calculate how many books are there in 10 shelves.

count the total number of 18

Think about the property of multiplication.

Use the time's table to solve the multiplication fact.