Wyoming Math 4.OA.3

4.OA.3 is a cluster heading. These are the individual standards under it.

• 4.OA.3a

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

• 4.OA.3b

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

01

What Students Need to Do

Students choose the operations needed to solve a story with several steps. They write equations with a letter for an unknown and decide what a remainder means. They check their answers with rounding or mental math.

02

What Mastery Looks Like

A student can show each step and use a letter for the number they need to find. They can explain why a remainder means an extra van is needed, or why some items are left over. They can use an estimate to spot an answer that is far off.

03

Common Misconceptions

Students may divide before adding everyone who needs a ride. They may drop a remainder instead of deciding whether another van is needed. Some give a rounded estimate as the exact answer.

04

How to Assess It

Exit ticket: A club has 53 students and 5 teachers, and each van holds 8 people. How many vans are needed? Write equations using a letter for the unknown, explain the remainder, and check by rounding.

1. 01

   Give pairs 53 blue counters, 5 red counters, and eight-space van mats; ask them to fill the vans and explain the last van.

2. 02

   Ask students to explain in writing why 58 ÷ 8 leaves 2 people but the club still needs 8 vans.

3. 03

   Pairs solve two cards with letter equations: 53 students and 5 teachers in eight-seat vans, then 48 pencils minus 3 broken ones in ten-pencil packs.

4. 04

   Use a supply order of 4 boxes with 12 pencils each and 7 loose pencils; ask how many ten-pencil kits can be made.

• 3.OA.8

  Solve two-step word problems (limited to the whole number system) using the four basic operations. Students should apply the Order of Operations when there are ...

• 2.OA.1

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