This clip provides two short exercises, one dealing with temperature changes, the other with changes in direction, to illustrate how to solve practical problems involving the addition of signed numbers.
This clip explains how to add mixed numbers. One method is to add the whole numbers and the fractions separately and combine the results. Another approach is to convert the mixed numbers to improper fractions, then add as usual, and then change the ...
This clip explains that adding more than two fractions with the same denominator is a two-step process. The first step is adding the numerators; the second step is converting the improper fraction that results to a mixed number.
This clip summarizes the main points of adding and subtracting decimal fractions. It revisits the idea that adding decimal fractions depends on lining up the addends by place value. The clip says that the easiest way to do this is by lining up the d...
This clip explains the importance of lining up the addends by place value when adding decimal fractions. It notes that every decimal fraction has a decimal point and, "
if we line up one column, all the rest line up automatically. Tens, units, tent...
This clip provides a distance problem which illustrates the fundamentals of adding decimal fractions. The clip suggests entering the decimal point of the answer before starting to add. It also suggests adding a zero to the right of the decimal point...
This clip explains the five-step sequence that should be followed when decimal fractions are added: first, put in any missing decimal points; second, write the addends in the column lining up the decimal points; third, fill in the gaps on the right ...
This clip explains that, when adding decimal fractions, it's a good idea to first insert the decimal point of the sum. Then, as with whole numbers, we start on the far right and work our way towards the left, adding up the numbers in each column as ...
This clip explains the use of parentheses to eliminate the confusion that might arise if two signs are written next to each other, as when adding a negative number. The clip notes that we don't run into this problem with positive numbers, because in...
This clip summarizes how to add signed numbers. It reviews two important rules, one pertaining to addition when the addends have the same sign, the other to addition when the addends have different signs. The clip also revisits the addition of 3 or ...