Danielle has 18 marbles. All the marbles are either black or gold. There are 4 more gold marbles than black. How many black marbles are there.
Since you're in second grade, I suggest you draw a picture of 18 marbles. Color a few of them black and color a few of them gold.
Can you figure it out from here?
Here's a better way.
After you've drawn 18 marbles, color 4 of them gold. Then color half of the rest black and the other half gold.
7 black marbles
Danielle has 18 marbles. All the marbles are either black or gold. There are 4 more gold marbles than black. How many black marbles are there.
Isn't it 5????
To find the number of black marbles, we need to set up an equation based on the given information.
Let's assume the number of black marbles is x.
According to the problem, there are 4 more gold marbles than black marbles. Therefore, the number of gold marbles would be x + 4.
The total number of marbles Danielle has is given as 18. So, we can add the number of black marbles (x) and the number of gold marbles (x + 4) to get 18:
x + (x + 4) = 18
Now, we can solve this equation to find the value of x, which represents the number of black marbles.
Combining like terms, we get:
2x + 4 = 18
Subtracting 4 from both sides:
2x = 14
Dividing both sides by 2:
x = 7
Therefore, there are 7 black marbles.