3.NBT.2 Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
3.OA.9 Identify arithmetic patterns (including patterns in the addition table or multiplication table), and explain them using properties of operations.
These pages allow students to practice using their understanding of place value to mentally add 1, 10, 100, or 1,000 to any number. My students worked with a partner to complete these problems. They used manipulatives to represent each number - flats (hundreds), longs (tens), and cubes (ones). Under the picture portion they drew a picture of the flats, longs, and cubes needed to create the new number, and under the number portion they wrote the new number. On the last page students had to identify the missing number in the pattern. They also drew picture representations for each number to help them see and identify the pattern.