Video Transcript
Isabella weighed these boxes of
fruit. Finish these sentences to describe
the masses of the boxes. The mass of the box of strawberries
is what kilograms. The box of what is the
heaviest. And the box of bananas is what
kilograms lighter than the box of oranges.
This question is all about
comparing the mass of some boxes of fruit. And we don’t need to do any
weighing to do this because Isabella has done it for us. We can see that she’s weighed a box
of bananas, a box of strawberries, and a box of oranges. And each of her sets of scales are
balanced. So this means we just need to count
how many kilograms she’s put on the other end. And then we’ll know how heavy each
box is.
How heavy is the box of
bananas? This large weight on the end here
is labeled five kg. We know this stands for five
kilograms. Then we have one labeled two
kilograms and two more that are labeled one kilogram. Five and two make seven. And then if we add the other two
ones, we have a total of nine. The box of bananas weighs nine
kilograms altogether. Now, let’s look at the box of
strawberries. If we look at the weights that are
labeled again, we can see one that’s labeled with a two on it. And there’s a two kilograms on the
top, another two kilograms here, and a one-kilogram weight on the end.
If we count in twos three times, we
get a total of six. Two, four, six. And then if we add the one
kilogram, this is seven kilograms altogether. Finally, if we look at the box of
oranges, we have a five-kilogram weight and another five-kilogram weight and, on the
top, we have a one-kilogram weight. Five and five make 10, and if we
add one more, that’s 11. The box of oranges weighs 11
kilograms.
Did you notice that each of these
masses is in kilograms? And because we’ve weighed these
objects in the same unit of measurement, all we have to do to compare them is to
look at the numbers. Let’s go through the sentences now
and see if we can complete them. The mass of the box of strawberries
is what kilograms. We’ve already worked that out,
haven’t we? Three lots of two and then one more
is seven kilograms. The box of what is the
heaviest. As we’ve just said, because
everything is measured in kilograms, we just need to compare the numbers. Which is the largest number out of
nine, seven, or 11? It’s 11, isn’t it? So 11 kilograms weighs most, and we
can say the box of oranges is the heaviest.
Finally, the box of bananas is what
kilograms lighter than the box of oranges. Well, we know that the box of
bananas weighs nine kilograms. And the box of oranges weighs 11
kilograms. What’s the difference between these
two masses? Nine, 10, 11. That’s a jump of only two
kilograms, isn’t it? So we can say that the box of
bananas is two kilograms lighter than the box of oranges. We’ve used the pictures of the
weighing scales to compare the masses of these three boxes of fruit. And we found that the mass of the
box of strawberries is seven kilograms. The box of oranges is the
heaviest. And the box of bananas is two
kilograms lighter than the box of oranges.
