Addition & Subtraction
Select 5 numerals to build up a correct expression.
Some Useful Tools
Virtual Base Ten Blocks
1. Math Learning Center: https://apps.mathlearningcenter.org/number-pieces/
2. Cool math 4 kids: https://www.coolmath4kids.com/manipulatives/base-ten-blocks
Paper Base Ten Blocks & Reader
3. https://www.geogebra.org/m/y4jwa8g8