Grade 2 Bar Models: Before-After Models

Worked examples

Real problems from the practice worksheets, solved one step at a time.

1. Example 1

   Sam had 23 apples. Sam got 7 more. How many apples does Sam have now?

   1. Sam starts with 23 apples. Getting 7 more makes the bar longer, so add.
   2. 23 + 7 = 30.
   3. Sam has 30 apples now.

   Answer: 30

2. Example 2

   Emma had 10 crayons. Emma gave away 5. How many crayons does Emma have now?

   1. Emma starts with 10 crayons. Giving away 5 takes a piece off the bar, so subtract.
   2. 10 − 5 = 5.
   3. Emma has 5 crayons now.

   Answer: 5

3. Example 3

   Tom had 16 crayons. Tom gave away 6. How many crayons does Tom have now?

   1. Tom starts with 16 crayons. Giving away 6 takes a piece off the bar, so subtract.
   2. 16 − 6 = 10.
   3. Tom has 10 crayons now.

   Answer: 10