Building
upon knowledge and skills gained in preceding grades,
by the end of Grade 2, students will:
Standard 4.1
(Number
and Numerical Operations) All students will develop number
sense and will perform standard numerical operations and
estimations on all types of numbers in a variety of ways.
Standard 4.1.1.A
Number
Sense
Standard 4.1.1.A.1
Use
real-life experiences, physical materials, and technology
to construct meanings for numbers (unless otherwise noted,
all indicators for grade 2 pertain to these sets of numbers
as well).
• Whole numbers through hundreds
• Ordinals
• Proper fractions (denominators of 2, 3, 4, 8, 10)
Standard 4.1.1.A.2
Demonstrate
an understanding of whole number place value concepts.
Standard 4.1.1.A.3
Understand
that numbers have a variety of uses.
Standard 4.1.1.A.4
Count
and perform simple computations with coins.
• Amounts up to $1.00 (using cents notation)
Standard 4.1.1.A.5
Compare
and order whole numbers.
Standard 4.1.1.B
Numerical
Operations
Standard 4.1.1.B.1
Develop
the meanings of addition and subtraction by concretely modeling
and discussing a large variety of problems.
• Joining, separating, and comparing
Standard 4.1.1.B.2
Explore
the meanings of multiplication and division by modeling and
discussing problems.
Standard 4.1.1.B.3
Develop
proficiency with basic addition and subtraction number facts
using a variety of fact strategies (such as "counting
on" and "near doubles") and then commit them
to memory.
Standard 4.1.1.B.4
Construct,
use, and explain procedures for performing addition and
subtraction calculations with:
• Pencil-and-paper
• Mental math
• Calculator
Standard 4.1.1.B.5
Use
efficient and accurate pencil-and-paper procedures for
computation with whole numbers.
• Addition of 2-digit numbers
• Subtraction of 2-digit numbers
Standard 4.1.1.B.6
Select
pencil-and-paper, mental math, or a calculator as the
appropriate computational method in a given situation
depending on the context and numbers.
Standard 4.1.1.B.7
Check
the reasonableness of results of computations.
Standard 4.1.1.B.8
Understand
and use the inverse relationship between addition
and subtraction.
Standard 4.1.1.C
Estimation
Standard 4.1.1.C.1
Judge without counting whether
a set of objects has less than, more than, or the same number
of objects as a reference set.
Standard 4.1.1.C.2
Determine the reasonableness
of an answer by estimating the result of computations (e.g.,
15 + 16 is not 211).
Standard 4.1.1.C.3
Explore a variety of strategies
for estimating both quantities (e.g., the number of marbles
in a jar) and results of computation.
