⭐️ Give your students engaging practice with mental math strategies as they learn to add or subtract 10 or 100 from 3-digit numbers (100–900). These worksheets are designed to strengthen number sense and build fluency with place value. Objectives Students will: Mentally add 10 or 100 to any given number between 100–900.Mentally subtract 10 or 100 from any given number between 100–900.Strengthen understanding of place value and number patterns.Build fluency in mental computation for Grade 2 mat