SALTA 2nd grade

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

Strand: Number and Operations in Base Ten Second grade students will use place value understanding and properties of operations to add and subtract.

Topic 10: Add Within 1,000 Using Models and Strategies

Topic 10:

Pick a Project: •

No new vocabulary words

Movie Time! Block the Shot! State Capital

• • •

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

California Mountains

10-1 Add 10 and 100 10-2 Add on an Open Number Line 10-3 Add Using Models 10-4 Continue to Add Using Models and Place Value 10-5 Add Using Place Value and Partial Sums 10-6 Explain Addition Strategies 10-7 Math Practices and Problem Solving: Repeated Reasoning

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 10 Manipulatives: •

Place-value blocks

Play dollar bills

•

Assessment Options: Topic 10 Assessment – Add Within 1,000 Using Models and Strategies (print or online) Topic 10 Performance Assessment – Add Within 1,000 Using Models and Strategies Team Created Assessment Assessment Tasks – Topic 10 USBE 2 nd Grade Standards Assessments Procedural Check

Application Task

2.NBT.7

Add

Morris had 5 ten-dollar bills, 1 five-dollar bill, and 6 one-dollar bills. He owed his mother $19. Explain what Morris needed to do in order to give his mother the exact amount he owed her. Use a picture to justify your answer. (DOK 3) Each morning Mr. Crosswell would quiz his children on their way to school. He gave the following problem to Corinne and Blake: What number is 10 more than 299? Corinne said that the answer was 309. Blake said the answer was 399. Who was correct? Explain your answer and explain what was wrong.

225 + 31

573

+225

(DOK 1)

2.NBT.8

Solve the following problems mentally. 487 + 10 = ________ 250 + ______ = 260

699 + 100 = _____ 435 + _____ = 535

(DOK 3)