**2.0** Students extend their use
and understanding of whole numbers to addition and subtraction of simple
decimals.

**2.1** estimate and compute the
sum or difference of whole numbers and positive decimals to two places

**2.2** round two-place decimals to one decimal
or the nearest whole number and judge
the reasonableness of the rounded answer

**3.0** Students solve problems involving
addition, subtraction, multiplication, and division of whole numbers and
understand the relationships among the operations.

**3.1 **demonstrate understanding of, and the
ability to use, standard algorithms for addition and subtraction of multi-digit
numbers

**3.4** solve problems involving division of
multi-digit numbers by one-digit
numbers

**1.0 **Students make decisions about how to
approach problems.

**1.1** analyze problems by identifying
relationships, discriminating relevant from irrelevant information, sequencing
and prioritizing information, and observing patterns

**1.2** determine when and how to break a
problem into simpler parts

**2.0** Students use strategies, skills, and
concepts in finding solutions.

**2.1** use estimation to verify the
reasonableness of calculated results

**2.2** apply strategies and results from
simpler problems to more complex problems

**2.4** express the
solution clearly and logically by using appropriate mathematical notation and
terms and clear language; support solutions with evidence in both verbal and symbolic work