Addition within 100 using a number
In this video, we’ll learn how to
add two numbers within 100 using a number line. When we count forward on a number
line, the numbers are increasing. Counting forward is the same as
adding. We can use some examples to help
show us how to add on a number line.
In this example, we need to use the
number line to find the sum of 63 and seven. So we need to start counting at
number 63. And then we need to count forward
seven because we’re adding seven. Add one, two, three, four, five,
six, seven. 63 add seven is 70. We started at 63 on the number line
and we counted forward seven.
In this example, we need to use a
number line to find the sum of 49 and nine. We need to start counting at number
49 and count forward nine more spaces. We started at 49, counted forward
nine spaces. And we finished at number 58. So we can say that 49 plus nine is
In this video, we’ve learned how to
add two numbers by counting forward on a number line.