I hope you brought your mask and flippers, because there is more to be done at the aquarium! Now that we've learned how to regroup with addition, we get to do practice with subtraction. Using the same base ten block models, students learn to regroup, or "borrow" from the tens place to subtract in the ones place. Taking a ten and breaking it down into ten ones takes practice, but our MightyOwl friends will help you along the way!

Learn to line up numbers vertically by place value when subtracting two digit numbers

Learn to start subtracting with the ones place, no matter how large the numbers are

Understand how to represent subtraction problems with base ten blocks, taking away from the first number

Learn to regroup in the tens place using models and charts by breaking a ten into ten ones

Accurately use a place value chart to solve two digit subtraction problems, remembering to start in the ones place

Standards addressed

CCSS.MATH.CONTENT.2.NBT.B.5

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.