1.NBT.4 Task Cards: Adding within 100 Task Cards 1.NBT.4 Centers: Add within 100:These 96 unique task cards are aligned with Common Core Standard 1.NBT.4: Adding within 100. Several types of questions help you assess your students' mastery of adding numbers within 100. Task cards are great for a whole-class game, math centers/stations, fast finishers, extra practice, homework, scavenger hunt, quiz-quiz-trade, morning work, small groups, or review for test. 1.NBT.4. Add within 100, including a