##### 2nd Grade

### Math Warm-Ups

(From Steve Wyborney)

Splat through 10:

Splat through 20

Multiple Splats

Number and Operations in Base Ten: Addition and Subtraction

The four games that can be played with this applet help to develop counting and addition skills.

Students select a target number between 10-20 and find missing addends to make the target number.

Adding strings of addends.

Students use their knowledge of addition, place value, and strategic thinking to try to get as close to 1,000 as possible.

Students use their knowledge of addition, place value, and deductive reasoning to determine what the secret two-digit number is.

Students practice subtraction within 1,000 as they race to get to zero.

La Diferencia Más Grande Gana (Spanish)

Students build procedural fluency with subtraction by finding the difference between 2-digit numbers or 3-digit numbers.

La Suma Más Grande Gana (Spanish)

Students build procedural fluency with addition by finding the sum of 2-digit numbers or 3-digit numbers.

Open Middle Task: Create an Equation

Students use only the digits 1 to 7, at most one time each, to fill in the boxes to create a true equation.

Open Middle Task: Adding Two-Digit Numbers (Elementary)

Students use the digits 1 to 9 at most one time each, to fill in the boxes to make the smallest (or largest) sum.

Open Middle Task: Subtracting Two-Digit Numbers (Elementary)

Students use the digits 1 to 9 at most one time each, fill in the boxes to make the smallest (or largest) difference.

Open Middle Task: Adding and Subtracting Two-Digit Whole Numbers

Students use the digits 0 to 9, at most one time each, to make a true statement.

3-Act Task Virtual Facilitation Guide

Recommended 3-Act Tasks:

(3-Act Task by Graham Fletcher)

Addition & Subtraction Within 100

(3-Act Task by Graham Fletcher)

Addition & Subtraction Within 1000