Help students use a 100 chart while discovering patterns of one more. This fun lesson will help students find connects between numbers and gain fluency with numbers within 100.

Will one be left out? Students will practice creative problem solving as they strive to answer this question and determine whether a group is even or odd.

Many students cringe when they see a subtraction problem with multiple zeros. The “Subtract One” strategy in this lesson involves reducing the top number by one to turn the 0 digits into 9’s and then adding the one back in at the end.