2ND GRADE NUMBER

2nd Grade Numbers of the Week (Use for morning work or as homework)

Represent and solve problems involving addition and subtraction

2.OA.A.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, and comparing, with unknowns in all positions, e.g. by using drawings and equations with a symbol for the unknown number to represent the problem.

Add To: Result Unknown Word Problems (within 100)
Take From: Result Unknown Word Problems (within 100)
Math Literature Link: Two of Everything
Math Literature Link: The Napping House
Math Literature Link: Counting Crocodiles
Math Literature Link: Night Noises
Math Literature Link: The Shopping Basket
Math Literature Link: My Little Sister Ate One Hare

NUMBER AND OPERATIONS IN BASE TEN

Understand place value

2.NBT.A.1 Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones. Understand the following as special cases:
a. 100 can be thought of as a bundle of ten tens – called a “hundred.” 
b. The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, nine hundreds (and 0 tens and 0 ones).

Race to 100
Base 10 Concentration (v.2)

2.NBT.A.2 Count within 1000; skip count by 5s,10s, and 100s.

Counting Collections
Count by Fives (v.4)
Math Literature Link: Two Ways to Count to Ten

2.NBT.A.3 Read and write numbers to 1000 using base-ten notation, number names, and expanded form.

Roll 3 Digits
Numeral Writing Barrier Game

2.NBT.A.4 Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols.

Comparing 3 Digit Numbers
Place Value Challenge (v.1)

Use place value understanding and properties of operations to add and subtract

2.NBT.B.5 Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

2-Digit Addition Trains (v.1-2)
Doubles Plus One (v.2)

2.NBT.B.6 Add up to four two-digit numbers using strategies based on place value and properties of operations.

Make 100

2.NBT.B.7 Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.

Base Ten Bag: Addition
Base Ten Pictures
3-Digit Addition Split

2.NBT.B.8 Mentally add 10 or 100 to a given number 100-900 and mentally subtract 10 or 100 from a given number 100-900.

Add 10 on a Number Line (3 digit)
Subtract 10 and 100

2.NBT.B.9 Explain why addition and subtraction strategies work, using place value and the properties of operations.