2*1=2
2*2=4
2*3=6
2*4=8
2*5=10
2*6=12
2*7=14
2*8=16
2*9=18
2*10=20
2+2+2+2+2+5+5=20
hok tốt
2x1=2
2x2=4
2x3=6
2x4=8
2x5=10
2x6=12
2x7=14
2x8=16
2x9=18
2x10=20
2+2+2+2+2+5+5= 20
2. 1= 2
2. 2=4
2. 3= 6
2. 4= 8
2. 5= 10
2. 6= 12
2. 7= 14
2. 8= 16
2. 9= 18
2. 10= 20.
2 + 2 + 2 + 2 + 2 + 5 + 5 = 2. 5 + 5. 2= 20.
Bảng nhân 2 :
2 x 1 = 2
2 x 2 = 4
2 x 3 = 6
2 x 4 = 8
2 x 5 = 10
2 x 6 = 12
2 x 7 = 14
2 x 8 = 16
2 x 9 = 18
2 x 10 = 20
Câu hỏi : 2 + 2 + 2 + 2 + 2 + 5 + 5 = ?
= 2 x 5 + 5 x 2
= 10 + 10
= 20 .
Tk nha!!
2 x 1 = 2
2 x 2 = 4
2 x 3 = 6
2 x 4 = 8
2 x 5 = 10
2 x 6 = 12
2 x 7 = 14
2 x 8 = 16
2 x 9 = 18
2 x 10 = 20