칸아카데미 따라가기_Math1
출처: Khanacademy Courses :2nd grade Unit : Add and subtract wihin 20 Learn: Adding within 20 using ten frames We want to figure out what is equal to eight plus seven. And I'm gonna give you a little bit of help by drawing what is known as ten frames. And these are useful because as you can see, each of these frames have ten boxes in them. One, two,three, four,five, six, seven, eight, nine, 10. Or..
2021. 8. 13.