Here is some information that will help explain some of the concepts we will be learning this year in math.
Addition with regroupingWhen solving addition problems that involve regrouping (formally referred to as "carrying"), it is essential that students start in the ones column. They should add these two digits together. If the sum of these digits is ten or larger, they should split the number into its place value. For example in the problem above 7 + 6 is 13, so you wrote the 3 under the ones place and regrouped the ten into the tens place. Students would then complete the problem by moving over to the tens place and adding all of the remaining numbers.
Tip: Remember when adding your tens place to refer to the numbers as 10, 20, 30, 40, etc. as apposed to 1, 2, 3, 4, and so on. Using the problem above, when adding the tens place you would add 10 + 30 + 20 not 1 + 3 + 2. Subtraction with regroupingSubtraction problems that involve regrouping (formally referred to as "borrowing") can be tricky for kids. Try this cute rhyme to help your child remember which step to use when they start their subtraction problem.
More on the top?... No need to stop! More on the floor?... Go next door and grab ten more! Numbers the same?... Zeros the game! |
Place Value: Base 10 BlocksIn the classroom, we use base ten blocks to visually show and break apart large numbers. You can download and print paper versions of base ten blocks to use at home by following the following links.
Template #1 Template #2 Counting Money:
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Word Problem Strategies
This year will we focus on solving word problems using four different strategies:
base ten blocks, open number lines, expanded form, and using an algorithm.
Below are examples of each strategy being used to solve the following word problem.
Julie answered 13 math problems on Monday and 25 math problems on Tuesday. How many math problems to did Julie solve in all?
base ten blocks, open number lines, expanded form, and using an algorithm.
Below are examples of each strategy being used to solve the following word problem.
Julie answered 13 math problems on Monday and 25 math problems on Tuesday. How many math problems to did Julie solve in all?
Algorithm
13 +25 38 Julie solved 38 math problems in all. Expanded Form
13 = 10 + 3 + 25 = 20 + 5 30 + 8 = 38 Julie solved 38 math problems. Base 10 Blocks
Students would draw out the base 10 blocks to represent the algorithm and solve the problem using the base 10 blocks. See the above link for print out copies of base 10 blocks to practice at home with. |
Open Number Line
Students will create a blank number line, like in the picture below, and make large jumps to solve the problem. To solve this particular problem, students would most likely start at 13, jump 2 groups of 10 (or 1 jump of 20) and a jump of 5 to reach the answer of 38. Here is another example of an open number being used to solve the addition problem 39 + 33.
Too confusing? Try this video explanation, from Youtube!
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