Respuesta :
Answer:
twenty is the answer all you have to do is skip count.
Answer: 19, 21
Step-by-step explanation:
add 2, then, 4. Since 13 is adding two. You must add 4 from fifteen. Making 19. Then two, making 21.
Answer:
twenty is the answer all you have to do is skip count.
Answer: 19, 21
Step-by-step explanation:
add 2, then, 4. Since 13 is adding two. You must add 4 from fifteen. Making 19. Then two, making 21.