Regrouping Activities for Grade Two
Regrouping is a curriculum standard for most states in the second grade. Many students find regrouping difficult. The process of regrouping requires the students to have a good understanding of number recognition and place value. Using manipulatives gives the students a chance to practice regrouping in both addition and subtraction.
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Race to 100
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Break the class into groups of two. Give each group two dice and a mat with the tens place and one place listed. The students roll the dice and add the total of the dice together. The students then draw out small blocks equal to the number they determined on the dice. The students trade in 10 small blocks for a rod, which they then place into the tens place value section of the board. Once the students have 10 rods, they have reached 100 and win. This reinforces regrouping with addition and place value between ones and tens places.
Dice Subtraction Game
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Break the students into pairs and provide each with a set of number cubes. The cubes must have 0 to 9 represented. The students will roll both cubes for the first number with the larger number on the die being in the tens place. For example, if the students roll a 3 and a 2, the resulting number is 32. The students then roll again but the larger number will be in the ones place. For example, if the students roll a 2 and a 6, then the number is 26. The students then must create a subtraction problem using the two numbers they created. Students must determine if regrouping is required. Time the activity and the pair with the most correct answers wins.
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Money Regrouping
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Break students into small groups and give them a bag of coins of pennies and dimes. Play money can be substituted for real money. Provide the students a number and ask them to create that amount with the coins they have. Discuss with the class the different ways the amount can be created. Provide another number and ask the students to create the amount using the fewest coins possible. For example, 44 cents would be represented by four dimes and four pennies. Ask the students to then subtract another number, which requires regrouping. Discuss the strategies of "breaking" the dime into ten pennies to answer the problem.
Write it Out With Manipulatives
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Create a subtraction problem that requires the students to regroup. Ask the students to create the problem using manipulatives with tens rods and ones blocks. The students then write out how many are in each place. For example, if the number is 58, there are five tens and eight ones. One of the tens places has to be regrouped and moved into the ones place. The students need to show the new arrangement using the manipulatives and then write out the amount of tens places and ones places the number has after regrouping. For regrouping 58, the number would be arranged as four tens rods and 18 ones blocks. The students then find the answer to the subtraction problem.
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