Counting to 100 in 10s and Ones
In this video, we will learn how to
count up to 100 objects by making groups of 10 and counting in 10s and ones. When we’re counting large groups of
objects up to 100, it helps to group them into 10s. This helps us to count more
accurately. We could count this group of
oranges by placing them into groups of 10. Here’s one group of 10. We’ve made two groups of 10. There are nine oranges left over,
not quite enough to make another group of 10. So how many oranges are there
altogether? There are 10 in the first
group. And if we count forward another 10,
that will take us to 20. And nine more than 20 is 29. We made the number 29 from two
groups of 10, which is worth 20 and nine more. Let’s practice counting up to 100
by grouping objects into 10s and ones.
How many marbles are there?
We’re shown a number of
marbles. The marbles have been grouped
together in groups of 10. And there are some ones left
over. There are four groups of 10. To help us work out what that’s
worth, we could count in 10s. One 10, 20, 30, and four 10s is
40. 10, 20, 30, 40. We counted in 10s four times. Let’s count the ones. One, two, three, four, five,
six. So we could start at 40 and count
forward six more. 41, 42, 43, 44, 45, 46. There are four groups of 10
marbles, which is worth 40 and six ones. 40 and six is 46. If there are four 10s and six ones,
there are 46 marbles.
Look at the balls and answer the
questions. How many 10s are there? How many ones are left? How many balls are there in
We’re shown an amount of tennis
balls. The balls have been grouped
together into 10s, and there are some ones left over. The first part of the question asks
us how many 10s there are. Let’s count the number of groups of
10. One, two, three, four, five. The second part of the question
asks us how many ones there are left over. One, two, three, four. And the final part of the question
asks us how many balls there are in total. We know that there are four ones
left over and five 10s. How much is five 10s worth? We could count in 10s. 10, 20, 30, 40, 50. Five 10s are 50. 50 and four gives us a total of
54. There are five 10s; there are four
ones and 54 balls in total.
How many owls are there? Hint: Make groups of 10.
We have to count the number of
owls. And to help, we’re told to group
them into 10s. We could use tens frames. We’ve made one group of 10. Now, we’ve made two groups of
10. Let’s count the 10s, 10, 20. And there are three owls left
over. 21, 22, 23. There are 23 owls. We made two groups of 10. And there were three left over. 20 and three more is 23.
What have we learned in this
video? We’ve learned that we can count
objects up to 100 by making groups of 10 and counting in 10s and ones.