ENDLESS PRACTICE for addition and subtraction of 10, according to 1.NBT.5! These 1000 TASK CARDS practice mentally adding and subtracting 10 from two-digit numbers as prescribed in 1.NBT.5. 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 task cards *A