DK Publishing
Addition with 3-Digit Numbers #1
Once your mathematicians can add two-digit numbers, it's time to bring on the three-digit addends. Here are 20 practice problems, each involving two whole-number addends. Learners do not need to regroup for any of these, and they have...
Scholastic
Study Jams! + and - Without Regrouping
Addition and subtraction are essential skills for all young mathematicians. Explain the step-by-step process with respect to place value using these real-world examples. Focus is on numbers in the tens, hundreds, and thousands, making...
Curated OER
Add It Up In Number Ville! Adding 2-Digit Numbers With and Without Regrouping
Young scholars explore adding 2-digit numbers. In this math lesson, students identify 2-digit numbers and use base ten blocks to practice adding. Young scholars use addition to break a code.
Curated OER
Addition of 2 Digit Plus 1 Digit (No Regrouping)
Learners review adding without regrouping the numbers. They are divided into groups and have to write the answer to the problem given on their papers.
Curated OER
Lesson Design Protocol: Add and Subtract
Addition and subtraction are studied in this math lesson plan. Upper graders add and subtract whole numbers up to 1,000 with and without regrouping.
Savvas Learning
How Many Hundreds?
Mental math skills are really important to develop. Kids practice metal computation by first adding the hundreds then the tens and ones. There are nine addition and nine subtraction problems to solve. This attractive worksheet is...
Curated OER
Number Sense
First graders practice rounding 4 digit numbers using place value concepts. In this estimating sums and differences activity, 1st graders explore clustering, rounding, and front end estimation as methods for rounding decimals.
Curated OER
Pattern Puzzles
A short video introduces place value in addition and subtraction. As a class, your students identify all even numbers up to one hundred and explain the pattern. They use addition strategies to fill in the missing numbers on the number grid.