Curated OER
Properties of Addition and Subtraction
In this using properties to solve word problems, learners find the sums and differences of two-digit numbers using the zero property and the order property of addition to problem solve. Students solve six problems.
Curated OER
Math Squares
It's Sudoku for beginners! Well, not exactly, but these math squares offer a fun way to practice addition for your learners. Each of the sixteen 3x3 squares has four numbers filled in. Scholars add the numbers across...
Curated OER
Secret Country Code Breaker
Super cool and totally fun math awaits your class. They are the code breakers, and their job is to identify and locate the secret agent by breaking two different codes. They use all their skills to solve a series of double-digit addition...
Illustrative Mathematics
1.OA, NBT, The Very Hungry Caterpillar
First graders are exposed to addition of three whole numbers in a math activity centered around Eric Carle's, The Very Hungry Caterpillar. As the teacher reads, young mathematicians use counters and ten-frames to symbolize the number of...
Curated OER
Number and Number Relations
Upper graders multiply numbers by tens and hundreds, and multiply two and three digit numbers by one digit numbers. They participate in a teacher-led lecture and complete examples with the class, complete a worksheet, and discuss the...
Curated OER
Doubles and Halves 3
Build mental math skills by teaching learners to double and half three-digit numbers. They start out by doubling one of seven double-digit numbers. Next, they discuss their strategy, and then practice doubling and halving 3-digit...
Concord Consortium
Calculator Numbers
Know thy calculator. Young mathematicians use their calculators to answer a set of questions. They consider how the number of digits the calculator displays affects the answers to calculations. They then find examples of computations...
Curated OER
Counting by 3s, 4s, and 5s
Skip count along the mushrooms to complete these number sentences which give young scholars an introductory look at addition and subtraction. Starting from five double-digit numbers, they subtract or add by threes, fours, and fives to...
Math Learning Center
Addition Strategies
Help young mathematicians refer to simple addition strategies with a set of math posters. The pages feature ways to remember how to add zero to a number, how to determine if a number is odd or even, and making fast tens.
Curated OER
Multiplication and Areas
Upper graders solve problems involving measurement of squares and rectangles to practice multiplication skills, finding area, and calculating prices and percentages. A performance assessment is included.
EngageNY
Decimal Expansions of Fractions, Part 1
Is it possible to add infinitely long decimals? As pupils complete the examples in the ninth lesson plan of this 25-part series, they determine that adding these decimals cannot be done without error. Their task is then to determine the...
Helping with Math
Addition - Three 3-Digit Numbers
There are 20 addition problems on this assignment, all of which require the addition of three three-digit numbers. All of them will require some regrouping to solve. This is terrific arithmetic practice to assign as homework. An answer...
EdHelper
Addition
In this addition instructional activity, 1st graders solve the double digit addition problems that are labeled with the category tens and ones. Students solve 14 problems.
Curated OER
Round Two-Digit and Three-Digit Numbers Practice 2.3
In this rounding worksheet, students solve 27 problems in which two or three digit numbers are rounded to the underlined place.
Curated OER
Addition and Subtraction
In this addition and subtraction worksheet, learners find the missing numbers for the double digit addition and subtraction equations. Students solve 13 problems.
Curated OER
Addition and Subtraction
In this addition and subtraction instructional activity, students solve the double digit math problems using addition or subtraction. Students solve 14 problems.
EdHelper
Addition and Subtraction
For this addition and subtraction worksheet, 1st graders add and subtract the single and double digit problems. Students solve 11 problem sets.
Curated OER
Addition and Subtraction
In this addition and subtraction worksheet, students solve the double digit addition or subtraction problems. Students solve 14 problems.
EdHelper
Addition and Subtraction
In this addition and subtraction worksheet, students use addition or subtraction to find the sum or difference for the 20 double digit problems.
EdHelper
Addition
For this addition activity, students solve the double digit addition problems that are labeled with the category tens and ones. Students solve 14 problems.
Curated OER
Math – Addition :3 Addends of 1-Digit with Doubles
In this addition practice worksheet, students solve 12 problems that require them to add 1-digit numbers with 3 addends. Two addends in each of the problems are doubles.
EdHelper
Addition
In this addition worksheet, students solve the double digit addition problems that are labeled with the category tens and ones. Students solve 14 problems.
EdHelper
Addition
In this addition learning exercise, 1st graders solve the double digit addition problems that are labeled with the category tens and ones. Students solve 14 problems.
Curated OER
2 Digit Addition Without Regrouping
In this addition instructional activity, students solve problems with the help of a number line. Students complete twenty simple two-digit addition problems.