Question

Some penguins were playing on the ice. Ten of them dove in the water. A few seconds later, 6 of those penguins jumped back onto the ice. Now there are 12 penguins on the ice. How many penguins were on the ice to start? Use numbers, pictures,or words to show how you got the answer.

Answer 1

16 because subtract 10 then you have 6 add 6 more that gets you 12

Answer 2

There were 16 penguins on the ice at the start.

What is an equation?

An equation is an expression that shows the relationship between two or more numbers and variables.

Let x represent the amount of penguins at start, hence:

x - 10 + 6 = 12

x - 4 = 12

Add 4 to both sides of the equation:

x - 4 + 4 = 12 + 4

x = 16

There were 16 penguins on the ice at the start.

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