**3.NBT.2 - Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or relationship between addition and subtraction**

**LearnZillion Resources:**

(seven sequenced lessons with practice)

1. Go to learnzillion.

2. Enter the quick code in any search field.

3. Enjoy watching the video.

lesson 1.

Solve for unknown amounts by using addition and subtraction fact families. quick code **LZ1579**

additional lesson:

Solve for unknowns: using commutative property. quick code LZ6

lesson 2.

Solve addition problems by using complements of ten and their multiples. quick code: **LZ1580**

lesson 3.

Solve addition word problems by identifying key phrases. quick code: **LZ1581**

lesson 4.

Solve subtraction word problems by identifying key phrases. quick code: **LZ1582**

lesson 5.

Solve subtraction problems by finding the distance between two numbers on a number line. quick code: **LZ1583**

lesson 6.

Partial Sums method means breaking numbers down into expanded form and adding like values. quick code: **LZ1584**

lesson 7.

Commutative Property: Numbers can be added in any order to get the same sum. quick code: ** LZ1585**

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