SALTA 2nd grade

Focus

Standards

Curriculum Supports – enVision 2020

Vocabulary

2.NBT.7 2.NBT.8 2.NBT.9

Strand: Number and Operations in Base Ten

Topic 11: Subtract Within 1,000 Using Models and Strategies

Topic 11:

Second grade students will use place value understanding and properties of operations to add and subtract.

No new vocabulary words

Pick a Project: •

Tall Trees

Standard 2.NBT.7 Add and subtract within 1,000 using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and that it is sometimes necessary to compose or decompose tens or hundreds.

Review as needed

Building with Snow

• •

Mountains High and Low

11-1 Subtract 10 and 100 11-2 Subtract on an Open Number Line 11-3 Subtract Using Models 11-4 Subtract Using Models and Place-Value 11-5 Explain Subtraction Strategies 3-ACT MATH: The Chemistry Set 11-6 Math Practices and Problem Solving: Make Sense and Persevere

Standard 2.NBT.8 Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.

Standard 2.NBT.9 Explain why addition and subtraction strategies work, using place value and the properties of operations. Explanations may be supported by drawings or objects.

Topic 11 Manipulatives: •

Place-value blocks

Play dollar bills

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Assessment Options: Topic 11 Assessment – Subtract Within 1,000 Using Models and Strategies (print or online) Topic 11 Performance Assessment – Subtract Within 1,000 Using Models and Strategies Team Created Assessment Assessment Tasks – Topics 11 USBE 2 nd Grade Standards Assessments Procedural Check

Application Task

2.NBT.7

Subtract. 154

John estimated 367 marbles in the class marble jar. The class counted the marbles and counted 185 less. How many marbles were in the jar? Use words, pictures, and numbers to justify your answer. (DOK 3) Chase read 18 pages on Monday. When he opened his book on Wednesday, he was on page 48. How many pages did he read on Tuesday? Use words, numbers, and pictures to justify your answer.

273

- 31

- 42

(DOK 1)

2.NBT.8

Solve the following problems mentally. 487 - 10 = ________ 281 - ______ = 250

750 + 100 = _____ 435 - _____ = 335

(DOK 3)

(DOK 1)

2.NBT.9

Add or subtract. $1.57 = ______ dollars ______ dimes ________ cents + $2.31 = ______ dollars ______ dimes ________ cents

The Jones family began saving their change to donate to the community shelter. In one week, the family members saved the following amounts. Saundra saved 3 quarters, 10 dimes, 18 nickels, and 9 pennies. Russell saved 6 quarters, 3 nickels, and 21 pennies.