Less Challenging

• Subtract within 100 taking from the 10

More Challenging

• Subtract crossing the 10 within 100

• Subtract 1 more or 1 less than a mult of 10

About This Sprint

• Subtract single-digit numbers from 2-digit numbers.

• Mental math strategy, e.g.

27 - 7 = 20

27 - 6 is one more than 20

27 - 8 is one less than 20