Bar Model — 4 + 4 = 8 — free printable diagram

What is 4 + 4?

This part-whole bar model shows 4 and 4 as the two parts of one whole. Adding the parts gives the whole, so 4 + 4 = 8.

First part

4

Second part

4

Whole

8

Addition

4 + 4 = 8

Subtraction

8 − 4 = 4

• A part-whole bar model shows the whole on one bar and the parts that make it on the bar underneath. Here the two parts are 4 and 4, and together they fill the whole bar of 8.
• Both parts are the same size, so this is a doubling fact: double 4 is 8.
• Reading it backwards gives the matching halving fact: 8 split into two equal parts is 4 each, so 8 ÷ 2 = 4.
• That is the fact family for these three numbers — the model is the reason 4, 4 and 8 belong together, whichever way round you write them.