NY Next Generation Math NY-3.OA.8

NY-3.OA.8 is a cluster heading. These are the individual standards under it.

• NY-3.OA.8.a

  Represent these problems using equations or expressions with a letter standing for the unknown quantity.

• NY-3.OA.8.b

  Assess the reasonableness of answers using mental computation and estimation strategies including rounding.

01

What Students Need to Do

Students solve two-step word problems with whole numbers and whole-number answers using any of the four operations. They represent unknowns and check whether answers are reasonable.

02

What Mastery Looks Like

The student identifies both steps, writes one or more equations or expressions with a letter for the unknown, and computes accurately. An estimate or mental check supports the answer.

03

Common Misconceptions

Students may perform operations in the order numbers appear rather than following the story. They may solve only one step or accept an unreasonable answer without checking.

04

How to Assess It

A teacher has 4 boxes of 8 markers and gives 9 markers away. Ask students how many remain, using a letter for the unknown, equations, answer units, and a reasonableness check.

1. 01

   Model a two-step story with counters, then replace the unknown amount with a letter in an equation.

2. 02

   Ask students which action happens first and how the story shows that order.

3. 03

   Play Step Match by pairing two-step stories with equations and estimated answer ranges.

4. 04

   Plan supplies for several tables, then account for items already available.

• NY-4.NF.4.c

  Solve word problems involving multiplication of a whole number by a fraction.

• NY-4.OA.3

  Solve multistep word problems posed with whole numbers and having whole-number answers using the four operations, including problems in which remainders must be...

• NY-2.OA.1.a

  Use addition and subtraction within 100 to solve one-step word problems involving situations of adding to, taking from, putting together, taking apart, and comp...