1 More, 1 Less, 10 More, 10 Less FREEBIENumber Sense Math Intervention | RTI & SPED SupportBuild number sense and place value understanding with this engaging 1 More, 1 Less, 10 More, 10 Less FREEBIE! Students use visual models and equations to practice identifying numbers that are one more, one less, ten more, and ten less. This low-prep math activity is perfect for small groups, intervention, RTI, math centers, morning work, and special education support. Students practice: Identifying 1 more