Which property let’s you regroup numbers that are being added or multiply

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Alana has 12.5 cups of flour with which she is baking four loaves of raisin bread and one large pretzel. the pretzel requires 2.5 cups of flour to make. how much flour is in each loaf of raisin bread? explain the steps to follow to get the answer.

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?