Unit 5 Overview:

In unit 5 students will continue to work on math fact fluency, addition and subtraction strategies and word problem structures. Students are continuing to work toward addition/subtraction fluency within 20 by adding and subtracting 10, using 10, and using doubles.

1. Students will use different models to solve real world addition and subtraction story problems using all subtypes involving one-step problems within 100. They will also solve two-step problems involving two easier subtypes using the same operation, such as add to/take from and put together/take apart with result/total unknown with sums and differences within 50 , (adding a 2-digit number plus a 2-digit number or adding a 2-digit number plus a 1-digit number). (2.OA.A.1)
2. Students will use addition and subtraction counting strategies (using ten, using doubles and near doubles) working towards fluency. (2.OA.B.2)
3. Students will compare two three-digit numbers based on meanings of the hundred, tens, and ones digits using >, =, and < symbols to record the results of comparisons. (2.NBT.A.4)
4. Students will mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900. (2.NBT.B.8)
5. Students will use various models to show, reason, and explain applied strategies based on place value and the properties of operations when adding and subtracting within 100. Note: Possible strategies to use as appropriate for students include: base-ten concrete models, base-ten quick pictures, breaking apart, number lines, compensation, hundreds chart. (2.NBT.B.5, 2.NBT.B.9)