We furthered the discussion by talking about whether or not a long should be in the one’s place and what we could do about it.There’s a reason math teachers start the year by introducing or reviewing place value concepts. I then asked him where do you think we can go to get more ones? After some discussion, he finally decided to use a ten and place it in the ones. I told him the first thing we had to subtract were the ones, and that we always had to ask ourselves one question, “Do I have enough ones to subtract?” In our problem, the answer was no. Subtraction TimeĪfter my children figured out the answer was 67, it became a game to see if we would get 67 with our base ten blocks. You might even find that this is a solution for a student who is struggling. It gives students another option for solving problems and developing number sense. If you haven’t taught subtraction on a hundreds chart, I would highly recommend it. He correctly figured out that the answer was 69. I wanted my little one to connect this activity with his background knowledge so our first step was to do 97-28 on our hundreds chart. We have actually done subtraction problems before, but always on the numbers chart. For example, my kiddo placed 9 longs under the 10’s column and then 7 ones in the one’s column. Once you have reviewed place value, the student now gets to fill up the base ten chart. The 7 was in the one’s place and actually represented 7. We discussed that the 9 was in the 10’s place and therefore was not 9 by 90. We had the number 97 as our largest number. Then have the children place the largest number in the top two spaces, and the lower number in the bottom two spaces. When we are subtracting, the largest number will go on top. Next, draw two more cards and make another two-digit number. Discuss what this number is.įor example, my first grader wanted to add them together when we first started, so make sure they understand that if they have a 4 and a 6 that the number is 46. The first step is to have your students draw two cards and place them face down on the table. Hands-on Subtraction with Regrouping Activities Finally, grab a deck of cards (remove all cards that do not have numbers or are greater than 9), base ten blocks, and dry erase marker.Begin by printing off the free printable.Subtraction with Regrouping Base Ten Blocks Today, I’m sharing a free base ten blocks printable to help you teach your students regrouping, or support your child with their homework. I was determined for my kiddos to understand what they were doing, and not just be able to do it.Īs I taught this way, I became a much better mathematician and someone who thoroughly enjoys math. As the teacher let us play with the blocks, and began to give us ideas on how to teach regrouping, a light bulb clicked.Īs I began teaching I didn’t want my experience to be the experience of my students. Just as a side note, they can represent decimals too if you change what block equals one!!!! Subtraction with Regrouping ActivityĪnyway, that day we were learning to regroup. If you are not familiar with them, they are used to help children understand place value.Ĭubes can represent ones, 10 cubes forming a straight line represents the 10’s place, and 100 cubes combine to form a square to represent the 100’s place. In front of us, we had a collection of base ten blocks. Math had never been my favorite subject in school, and I wasn’t excited about spending the next hour discussing it. I was sitting in a class on how to teach math, and honestly, I wasn’t thrilled. I remember the moment like it was yesterday. This free subtraction with base ten blocks file folder activity is perfect for teaching children how to subtract in a hands-on way. 6) Subtraction with Base Ten Blocks Worksheets Subtraction with Base Ten Blocks
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