Calculator Countdown

Act 1

1. How many times was the same number subtracted from 104 to get to 5?

2. Write down a guess.

Act 2

3. What information would be useful to figure this out?

4. Write down some questions you have in your head right now.

Act 3

Sequel

5. What other numbers could be used to subtract down from 104 to 5?

STandards

Common Core

• 3.NBT.A.2 - Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.

TEKS

• 3.5(A) - represent one- and two-step problems involving addition and subtraction of whole numbers to 1,000 using pictorial models, number lines, and equations