ENDLESS PRACTICE for addition and subtraction of 10 or 100, according to 2.NBT.8! These 1000 TASK CARDS practice mentally adding and subtracting 10 or 100 from two-digit numbers as prescribed in 2.NBT.8. 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. What’s included?1000 task cards printed 4 to a page *A version with answers on the backs of the