Answer:
See explanation
Step-by-step explanation:
There are 4 red tulips and 9 white tulips in a vase.
1. You can group 1 red tulip and 9 white tulips. This group of tulips consists of
1 red tulip + 9 white tulips = 10 tulips.
If there were 4 red tulips, then
4 - 1 = 3 red tulips left.
In total,
10 tulips + 3 remaining red tulips = 13 tulips.
2. You can group 4 red tulips and 6 white tulips. This group of tulips consists of
4 red tulips + 6 white tulips = 10 tulips.
If there were 9 white tulips, then
9 - 6 = 3 white tulips left.
In total,
10 tulips + 3 remaining white tulips = 13 tulips.
