This model represents 128.
You want to keep adding ones blocks to the model until it stands for 140.
How many ones blocks should you add?
2
12
10
20
This model represents 128. You want to keep adding ones blocks to the model until it stands for 140. How many ones blocks should you add?
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To determine how many ones blocks you need to add to get from 128 to 140, you can subtract 128 from 140:
140 – 128 = 12
So, you need to add 12 ones blocks to the model to reach 140.
The correct answer is 12.