MA19.1.2

Mathematics (2019) Grade(s): 1

MA19.1.2
Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20 by using concrete objects, drawings, or equations with a symbol for the unknown number to represent the problem.

Unpacked Content

Knowledge

Students know:

The relationship between addition and subtraction.
how to explain subtraction as an unknown addend.

Skills

Students are able to:

use symbols such as blanks, boxes, or letters to represent unknown quantities in equations.
Communicate the connections between subtraction and addition.
Use the inverse relationship between addition and subtraction to find differences.
Choose and apply addition and subtraction strategies to accurately determine sums and differences within 20.

Understanding

Students understand that:

addition and subtraction have an inverse relationship that can be used to solve problems.

Vocabulary

Addend

Aligned Learning Resources

Triple Fun Shopping (Addition Task)

Three Addends Assessment

Letter Tile Addition

Making a Difference Solving Word Problems

Finding the Difference Using the Crayon Box

Multimedia Math Word Problems with Seesaw

Zoo Summer Camp Mystery

Fruit Loop Sorting, Graphing, and Problem-Solving

Peg + Cat: Mega Mall

Design by Adaptive Theme