# Math: More Adding and Subtracting

### Suggested Time Frame: 18 Instructional Days

##### Focus TEKS

Adding and Subtracting – Using Place Value

• 1.3A  Use concrete and pictorial models to determine the sum of a multiple of ten and a one-digit number in problems up to 99
• 1.5C  Use relationships to determine the number that is 10 more and 10 less than a given number up to 120

• 1.3D Apply basic fact strategies to add and subtract within 20, including making 10 and decomposing a number leading to a 10
• 1.5F Determine the unknown whole number in an addition or subtraction equation when the unknown may be any one of the three or four terms in the equation
• 1.5G Apply properties of operations to add and subtract two or three numbers

Adding and Subtracting – Problem Solving

• 1.3B Use objects and pictorial models to solve word problems involving joining, separating, and comparing sets within 20 and unknowns as any one of the terms in the problem such as 2 + 4 =___; 3 +___= 7; and 5 =___– 3
• 1.3F Generate and solve problem situations when given a number sentence involving addition or subtraction of numbers within 20

Adding and Subtracting – Representing and Explaining

• 1.3E Explain strategies used to solve addition and subtraction problems up to 20 using spoken words, objects, pictorial models, and number sentences
• 1.5D Represent word problems involving addition and subtraction of whole numbers up to 20 using concrete and pictorial models and number sentences
• 1.5E  Understand that the equal sign represents a relationship where expressions on each side of the equal sign represent the same value(s)
##### Numeracy TEKS

Counting Patterns and Quantities (Suggested: 6 days)

• 1.4A  Identify U.S. coins including pennies, nickels, dimes and quarters by value and describe the relationships between them
• 1.4B Write a number with the cent symbol to describe the value of a coin
• 1.4C  Use relationships to count by twos, fives, and tens- to determine the value of a collection of pennies, nickels and/or dimes
• 1.5A Recite numbers forward and backward from any given number between 1 and 120
• 1.5B  Skip count by twos, fives, and tens to determine the total number of objects up to 120 in a set;
• 1.5C  Use relationships to determine the number that is 10 more and 10 less than a given number up to 120

Developing Strategies for Adding and Subtracting (Suggested: 10 days)

• 1.3D Apply basic fact strategies to add and subtract within 20, including making 10 and decomposing a number leading to a 10
• 1.5F Determine the unknown whole number in an addition or subtraction equation when the unknown may be any one of the three or four terms in the equation
##### Spiral Review TEKS

Revisiting Shapes and Fair Shares (Suggested: 8 days)

• 1.6A  Classify and sort regular and irregular two-dimensional shapes based on attributes using informal geometric language
• 1.6B Distinguish between attributes that define a two-dimensional or three-dimensional figure and attributes that do not define the shape
• 1.6C  Create two-dimensional figures, including circles, triangles, rectangles, and squares as special rectangles, rhombuses, and hexagons
• 1.6D Identify two-dimensional shapes, including circles, triangles, rectangles, and squares as special rectangles, rhombuses, and hexagons, and describe their attributes using formal geometric language
• 1.6E Identify three-dimensional solids, including spheres, cones, cylinders, rectangular prisms [including cubes], and triangular prisms, and describe their attributes using formal geometric language
• 1.6F  Compose two-dimensional shapes by joining two, three, or four figures to produce a target shape in more than one way if possible
• 1.6G  Partition two-dimensional figures into two and four fair shares or equal parts and describe the parts using words
• 1.6H  Identify examples and non-examples of halves and fourths

Measuring Length (Suggested: 8 days)

• 1.7A  Use [non-standard] measuring tools to measure the length of objects to reinforce the continuous nature of linear measurement
• 1.7B  Illustrate that the length of an object is the number of same-size units of length that, when laid end-to-end with no gaps or overlaps, reach from one end of the object to the other
• 1.7C  Measure the same object/distance with units of two different lengths and describe how and why the measurements differ
• 1.7D  Describe a length to the nearest whole unit using a number and a unit

Counting Quantities (Suggested: 2 days, using both numeracy and spiral review time)

• 1.5A recite numbers forward and backward from any given number between 1 and 120;
• 1.5B skip count by twos, fives, and tens to determine the total number of objects up to 120 in a set;
• Counting Coins (Make this the focus on 1 day of Counting Collections)

• 1.4A  Identify U.S. coins including pennies, nickels, dimes and quarters by value and describe the relationships between them
• 1.4B Write a number with the cent symbol to describe the value of a coin
• 1.4C  Use relationships to count by twos, fives, and tens- to determine the value of a collection of pennies, nickels and/or dimes

Telling Time (Ongoing)

• 1.7E  Tell time to the hour and half hour using analog and digital clocks