Use place value understanding and properties of operations to perform multi-digit arithmetic

Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction. (A range of algorithms may be used.)

Related Lessons

• Lesson 207

Warm up with a Mystery Math Mistake to hunt for the mistake made counting up on the number line. Use a Rekenrek and number line to explore rounding numbers to the nearest ten and hundred.

• Lesson 208

Round to the Nearest 10 or 100

Warm up with a Mystery Math Mistake to hunt for the mistake made counting up on the number line. Use place value cards to practice rounding numbers to the nearest ten and hundred.

• Lesson 205

Subtract within 1,000

Warm up with a Mystery Math Mistake to figure out what went wrong when adding two 3-digit numbers. Subtract within 1,000 using a number line and compensation and decompose strategies.

• Lesson 206

Traditional Method to Subtract within 1,000

Warm up with a Mystery Math Mistake to find a mistake made in using an algorithm for addition and subtraction. Subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.

• Lesson 113

Find the Area of Figures

Use decomposition to find the area of figures. How will you decompose the figures into rectangles? Engage in a Number Talk and compare your strategies to others.

• Lesson 111

Different Units to Measure Area

Explore area with square inches and centimeters. How can we use square inch tiles and centimeter cubes to compare the area of squares and rectangles? You'll also engage in a Number Talk focused on subtraction strategies.

• Lesson 112

Solve Area Problems

Explore area with partially tiled rectangles. Can you apply what you know about multiplication to figure out the area of the rectangle? Discover lots of different units that we can use to measure area. Engage in a Number Talk and compare your strategies with others.

• Lesson 114

Find the Area with Missing Side Lengths

Find area of figures with missing side lengths. How will you decompose the figures into rectangles to find the area? Engage in a Number Talk and compare your strategies with others.

• Lesson 201

Represent Numbers in Different Ways

Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. Find Which One [...]

• Lesson 202

Solve Problems with Addition & Subtraction

Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. Use visual models [...]

• Lesson 203

Warm up with a Mystery Math Mistake as you add two 3-digit numbers using a partial sums strategy. Use strategies [...]

• Lesson 204

Warm up with a Mystery Math Mistake as you add two 3-digit numbers using a partial sums strategy. Use a [...]

• Lesson 314

Fractions and Whole Numbers

Join Ms. Askew for a Mystery Math Mistake. Can you find her subtraction mistake? Next we'll use number lines to learn more about fractions that are whole numbers!

• Lesson 313

Locate Non-Unit Fractions

Join Ms. Askew for a Mystery Math Mistake. Springlinng needs your help! Next we'll partition, locate and label non-unit fractions on number lines!

• Lesson 301

Multiply with Multiples of 10

Join Ms. Askew to talk about numbers with her Math Mights friends, and then learn about multiplying one-digit whole numbers by multiples of 10.

• Lesson 302

Multiply with Larger Numbers

Join Ms. Askew to talk about numbers with her Math Mights friends. Next, she is going to help you take multiplication to a whole new level as we multiply numbers larger than 20!

• Lesson 218

Multiply Teen Numbers with Larger Groups

Join Mrs. Askew for a Number talk with 2 Math Might Friends! Then let's solve some problems with equal groups that have larger numbers!

• Lesson 217

Multiply with Teen Numbers

Join Mrs. Askew for a Number Talk with 2 Math Might Friends! Then get ready to have D.C. help us represent multiplication with teen numbers!

• Lesson 215

Relating Division to Multiplication

Join Ms. Askew for a subtraction number talk with Springling! Get ready to have some fun with relating division to multiplication.

• Lesson 216

Relating Multiplication and Division

Join Ms. Askew for a subtraction number talk with Springling! Get ready to learn how you can quickly multiply and divide by relating multiplication and division.

• Lesson 213

Multiply with “Groups of”

Join Ms. Askew for a subtraction number talk with Springling! Get your multiplication brain ready as you learn how to say "group of" instead of "times".

• Lesson 214

Dividing with Fair Shares

Join Ms. Askew for a subtraction number talk with Springling! Get your math brain ready as we learn to divide one group into smaller groups.