Siri Learning

Attention Getting Question: How can we calculate numbers quickly and accurately in our head without writing it down? A reliable method is to round the numbers. That makes mental math easy! Introduction: Your family wants to save money for a new computer. The total cost for the system is $1,287. So far, $729 has been saved. About how much more money is needed? Subject: The word “about” is a clue that an exact answer is not necessary.When we use other numbers to find an answer that is “close,” it

Attention Getting Question: Have you ever tried to multiply a four-digit number? Introduction: Multiplying helps us to determine how many total objects are represented when we have multiple groups of the same size. For instance, we know that when we multiply four times six, our answer will be twenty-four. We can think of this as having four groups of six objects or six groups of four objects. Being able to switch the factors and still get the same product or answer in a multiplication equation i