Question

Write a story problem for the addition sentence 7+__=9. Solve the story problem.

Answer 1

if K.C. has 7 tablets and her mom and dad get her sister, liz, 2 tablets how many tablets would her and her sister have?
7+ =9 9-7= 2
9 is the whole
7 is how many K.C. has
2 is how many liz has

Answer 2

Story:

Karina had 7 notebooks. He sister left for her some more notebooks, but Karina did not check how many.

Later she counted, and she had 9 notebooks.

How many notebooks did her sister leave for her?

and the solution:

7+x=9

we subtract 7 from both sides:

7-7+x=9-7

now we calculate what we can:

x=2

so the solution is: she left two notebooks.