Video Transcript
Tally Marks
In this video, we will learn how to
count objects or votes and record how many there are using tally marks.
People have been using tallies or
marks to help them count for thousands and thousands of years. This is a tally bone. People would carve a mark on the
bone to represent each count of one. People have also used tally sticks
to help them count for thousands of years. One stick is used to represent a
count of one. Two sticks represent the number
two. Now, we have three, four, five.
When we count using tally sticks or
tally marks, the fifth mark is always placed across the other four. When we’re counting large amounts,
we can use these groups of five to help us count in fives. A group of five marks and one more
is six. Five and two more is seven. Five and three is eight. Five and four is nine. And two groups of five are used to
show a count of 10.
We use tally marks in exactly the
same way as a tally bone or a tally stick. Each mark is used to represent a
count of one. One, two, three, four, five. Remember, the fifth tally mark or
tally stick is placed diagonally across the other marks. Grouping tally marks into groups of
five helps us to count larger groups of objects. A group of five and one more is
six. Five and two more is seven. Five and three is eight. Five and four is nine. And two fives make 10.
A tally chart is a really useful
way of helping us to count objects using tally marks, especially when the objects
we’re counting can move around. You could use a tally chart to
count the number of insects in the garden. How many caterpillars did we
count? There’s a group of five tally marks
and two more. Five and two more is seven. How many bees were there in the
garden? Four. And there were three Ladybirds.
We can use our tally chart to help
answer questions about the information we’ve collected. We can say that the most common
insect in the garden was the caterpillar and the least common insect was the
Ladybird. Let’s practice using tally marks
and tally charts.
The tally chart shows a group of
students’ favorite superheroes. Do 10 students like Wonder
Woman?
In this question, we’re shown a
tally chart. It shows a group of students’
favorite superheroes. The students had to choose their
favorite superhero from Wolverine, Superman, Wonder Woman, or Spider Man. Each time a student voted for their
favorite superhero, their vote was counted with a tally mark.
How many students voted for
Wolverine? There are two groups of five tally
marks. And we know that two groups of five
make 10. There’s only one group of five for
Superman. We know that five students voted
for Superman. How many students voted for Wonder
Woman? Was it 10? There’s a group of five tally marks
and four more. Five and four more is nine. So, the answer to the question “Do
10 students like Wonder Woman?” is no. 10 students like Wolverine, five
like Superman, nine liked Wonder Woman, and four liked Spiderman. The answer to the question “Do 10
students like Wonder Woman?” is no.
The given tally chart shows items
sold at a stationery store. How many fewer pencils than erasers
are sold?
In this question, we’re given a
tally chart. The chart shows the number of items
that were sold at a stationery store. They sold erasers, highlighters,
pencils, and scissors. We have to work out how many fewer
pencils than erasers are sold. To do this, we need to look closely
at the tally chart and compare the amount of erasers and pencils that were sold.
How many erasers were sold? There’s a group of five tally marks
and four more. Five and four more makes nine,
five, six, seven, eight, nine. And this column shows us the amount
of pencils that were sold. There’s a group of five tally
marks. We already know that the shop sold
fewer pencils than erasers. How many fewer?
We need to find the difference
between nine and five. This is the difference. The stationery store sold four
fewer pencils than erasers. The difference between nine and
five is four. The store sold four less pencils
than erasers.
The tally marks show the number of
students in a class that play different sports. How many more students play
volleyball than soccer?
In this question, we’re shown a
tally chart. The chart shows the number of
students in a class that play different sports: soccer, volleyball, handball, and
swimming. We have to find out how many more
students play volleyball than soccer. So, we need to compare the number
of students who play soccer to the number of students who play volleyball. When we count using tally marks, we
make a group of five in this way to show a count of five.
One group of five is five, and
three groups of five are 15. So, the number of children who play
soccer is 15. There are four groups of five
tallies in the column which shows the number of children who played volleyball. So, we can count in fives to find
the total number. Five, 10, 15, 20. Four fives are 20. How many more is 20 than 15? There are five more tally
marks. 20 is five more than 15. Five more students play volleyball
than soccer.
What have we learned in this
video? We’ve learned how to use tally
marks to count objects or votes and record how many there are using tally marks.
