Kindergarten Mathematics Addition & Subtraction Word Problems
Understandings:
Students will use their knowledge of joining and separating problems to solve word problems with objects and drawings. (K.3) B
Students will use their knowledge of solving word problems using objects and drawings to find sums and differences within 10 to now being able to explain their thinking and strategies they used to solve addition or subtraction problem situations. When explaining their thinking and the strategies they used, students should be able to use their words, drawings, pictures, objects, and numbers. (K.3) C
Embedded Throughout Unit:
Students should be able to count to 20 and back from 20 with and without the use of objects. If students are using one-to-one correspondence where each object counted is matched accurately with a number word in correct sequence, students should be able to accurately recite the number they are counting. Students would gradually be able to recite the numbers to and from 20 without the use of objects. (K.2) A
Students must be able to name the number of objects in a set without counting but rather by instantly identifying the arrangement of objects. This instant recognition of a quantity is called subitizing. Everyday common objects such as the pips on dominoes or dice are helpful for students to understand this concept. Objects that come in groups of 2, 4, 5, and 10 are easiest for students to form a mental picture of first such as shoes, socks, fingers, toes, etc. (K.2) D
Students should be able to recite numbers as it relates to counting forward by ones and tens from any number between 1 and 100. (K.5) A
TEKS:
K.3(B)(R) Solve word problems using objects and drawings to find sums up to 10 and differences within 10.
K.3(C)(S) Explain the strategies used to solve problems involving adding and subtracting within 10 using spoken words, concrete and pictorial models, and number sentences.
TEKS Embedded Throughout Unit:
K.2(A)(S) Count forward and backward to at least 20 with and without objects
K.2(D)(S) Recognize instantly the quantity of a small group of objects in organized and random arrangements
K.5(A)(S) Recite numbers up to at least 100 by ones and tens beginning at any given number
Learning Targets:
I can solve word problems using addition and subtraction
I can explain strategies used to solve addition and subtraction problems
I can rote count numbers 0-50
I can rote count backwards 20-0
I can recite numbers by tens to 100
I can recognize instantly the quantity of a small group of objects up to 10 objects
Essential Questions:
How can you represent (show) the quantity displayed in a set of objects?
What are the different ways that you can represent (show) a number?
How can a number be composed and decomposed in different ways?
What are some strategies for accurately counting and keeping track of quantities?
What words can we use to describe joining and breaking apart?
What stories can we tell about joining (composing) and breaking apart (decomposing)?
