Math

Unit 2-5-Groups in Numbers 6-10

How are real life experiences described by addition and subtraction?

Students understand that real life experiences can generate addition and subtraction problems with the structures Add to/Take From and Put Together/Take Apart.

In this unit, students explore the mathematics in real world situations involving adding to or taking from a quantity or putting two quantities together or taking a quantity apart. Students model the real world situations with concrete materials, and they use counting and subitizing to solve and explain their solutions. Students begin to explore the structure of quantities by breaking a quantity into two parts, highlighting partitions that involve a group of five. Students continue to build fluency with the number sequence, including rote counting forward to 20 and backward from 5 and sequencing quantities and numerals in the range 1-10. They connect their growing understanding of addition and subtraction to the idea of adding one as moving to the next number in the number sequence and subtracting one as moving back to the previous number in the sequence. Students revisit previous learning about attributes of shapes and extend it to recognizing, describing, building, and drawing triangles and hexagons.