Question

14 bugs are crawling on the steps. Some of the bugs are black, and 4 are

green. Choose the number sentence that can be used to find the number
of black bugs.
14 + 4 =
4 +
= 18
4 +
= 14

Answer 1

4 + _ = 14

Explanation:

because there are 14 bugs in all and we already know there are 4 green bugs so we put the total at the end and the 4 in the beginning.

Answer 2

b = 14-4

Explanation:

Let the number of black bugs be b

Let the number of green bugs be g

If 14 bugs are crawling on the step, then;

b + g = 14 ....1

If there are 4 green bugs, then g = 4

Substitute g = 4 into the equation

b + g = 14

b + 4 = 14

b = 14 - 4

Hence the sentence that can be required to find the number of black bugs is b = 14-4