Welcome! Today we'll learn how to add seven plus eight. We can see seven blue dots and eight red dots. Let's count them together to find the answer.
Now let's count all the dots together. We start with the blue dots: one, two, three, four, five, six, seven. Then we continue with the red dots: eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen. So seven plus eight equals fifteen!
Another way to solve seven plus eight is using a number line. We start at number seven, then make eight jumps forward: eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen. We land on fifteen, so seven plus eight equals fifteen!
Here's a smart strategy called 'make a ten'. We take 3 from the 8 and give it to the 7 to make 10. Now we have 7 plus 3 equals 10. The remaining part of 8 is 5, because 8 minus 3 equals 5. Finally, 10 plus 5 equals 15. So 7 plus 8 equals 15!
Great job! We've learned three different ways to solve seven plus eight. We can count all the objects, use a number line, or use the make-a-ten strategy. All methods give us the same answer: seven plus eight equals fifteen. Now you know how to add these numbers!