Which of these expressions is a non~tabular divisions? 45:5, 12:3, 56:2, 90:9

A non-tabular division refers to a division expression that doesn't fit into a traditional or common division table (often taught in elementary education). In the examples provided, we can evaluate each division:

• 45 ÷ 5 = 9
• 12 ÷ 3 = 4
• 56 ÷ 2 = 28
• 90 ÷ 9 = 10

All of these divisions can be calculated using basic division, but if we are considering the context of "non-tabular" as more unusual or less common (i.e., not often memorized or emphasized in basic division tables), then:

• 56:2 = 28 is the least commonly known result from simple tables (as most basic tables focus on lower numbers).

However, if you're looking for the answer based on whether the division results are typically covered in basic math education, all of them could be considered tabular since they represent basic calculations.

Given this, please specify if you need a different context or criteria for identifying a "non-tabular division."