2.NBT.1/NUMBERS AND OPERATIONS IN BASE TEN
MATH DOMAIN
Grade 2
Math Cluster
2.NBT.1/NUMBERS AND OPERATIONS IN BASE TEN
Math Standard
Understand
place value.
August 2013
Mathematic Practices
2.NBT.1 Understand that the
three digits of a three-digit
number represent amounts of
hundreds, tens ,and ones.
Understand:
 100 can be bundled into
ten tens and called a
“hundred.”
The numbers 100, 200, 300, 400,
500, 600, 700, 800, and 900 refer
to one, two, three, four, five, six,
seven, eight, and nine hundreds
(and 0 tens and 0 ones).
Reporting Standard
Base Ten: Understands place value and base-10
models to 1000.
2. Reason abstractly and
quantitatively.
4. Model with mathematics.
5. Use appropriate tools strategically.
6. Attend to precision.
7. Look for and make use of structure.
8. Look for and express regularity in
repeated reasoning.
Trimester 1
Trimester 2
Trimester 3
Taught to
mastery
(tested)
Review
(tested)
Review
(tested)
Task Analysis
1.NBT.2 Understand that the two digits of a two-digit number represent amounts of tens and
ones. Understand:
A. 10 can be bundled and called a “ten.”
B. 11-19 are composed of a 10 and numeral between 1 and 9 which represent ones.
C. Counting by tens refers to bundles of tens. For example, “20” refers to two bundles of ten.
Learning Tasks:
 Know the place value position of ones, tens, and hundreds in three digit numbers.
 Understand a hundred is made from ten bundles of tens.
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2.NBT.1/NUMBERS AND OPERATIONS IN BASE TEN
 Count by hundreds to 1000.
2.NBT.1 Understand that the three digits of a three-digit number represent amounts of
hundreds, tens ,and ones. Understand:
 100 can be bundled into ten tens and called a “hundred.”
The numbers 100, 200, 300, 400, 500, 600, 700, 800, and 900 refer to one, two, three, four,
five, six, seven, eight, and nine hundreds (and 0 tens and 0 ones).
Vocabulary
Explicit
Prior




Ones
Tens
Hundreds
Digit




Ones
Tens
Hundreds
Digit
Introduce

Place value
2.NBT.1 Sample Assessment Items earning a “3” in reporting system
 What digit is in the 100’s place in 459?
 Write a three digit number with a 2 in the one’s place.
 In the number 409, how many:
hundreds: __________
tens:
__________
ones:
__________
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2.NBT.1/NUMBERS AND OPERATIONS IN BASE TEN
 Write the number shown by the base-ten model.
 Julie has 7 hundreds and 2 ones. What number does Julie have?
 How many tens equal 130?
1.NBT.1 Sample Items earning a “4” in reporting system
Amanda is putting pencils in plastic bags in groups of 10. She has 15 groups with 3 pencils left
over. Amanda gives her teacher the plastic bags and the 3 left over pencils. Her teacher gives
out 11 bags to students as prizes. Now her teacher empties out the plastic bags and gives
Amanda all the left over pencils to keep.
 How many left-over pencils does Amanda get?
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