ENDLESS PRACTICE for addition and subtraction within 1,000 according to 2.NBT.7! practice adding and subtracting up to 1,000 as prescribed in 2.NBT.7. Task cards are great for a whole-class game, math centers/stations, fast finishers, extra practice, homework, scavenger hunt, quiz-quiz-trade, scoot, morning work, small groups, or review for test.