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Use this tool for independent practice and reinforcement of concepts in the classroom. Kids can enter their names to set up user profiles, and multiple kids' progress can be tracked on each device. Allow kids time to practice at the start or end of a class period and have them share their performance reports. Keep a class leaderboard and reward top performances if desired.Continue reading Show less
Understanding Math – Addition and Subtraction is an elementary math practice tool aligned to several Common Core State Standards. On the home screen, there are six options for play. In Addition – Tap with your fingers, kids tap their fingers on the screen to represent each addend in an addition equation. The addends appear as objects, and the sum appears in the equation. Kids can pop the objects before moving on to the next problem. In Addition, kids add using place value by dragging down the correct tens and ones to represent each addend. In Subtraction, kids also drag down the correct tens and ones to find the difference of two numbers. In Training, write the solutions to addition and subtraction problems on the screen. A place value mode appears at the bottom of the screen. In Duel, kids can compete with another player, and each player can select a difficulty level between 1 and 4. The first to enter the correct solution wins a star, and five stars wins the game. Finally, in Toolbox, kids can enter their own addition or subtraction equations.
Overall, this is a good tool for addition and subtraction practice. The problems are straightforward addition and subtraction problems and are not particularly engaging. However, answering them provides enough interactivity to keep kids engaged. They can choose to work with a mode that requires them to tap their fingers on the screen to represent each addend in an equation. If done correctly, the sum automatically appears to complete the equation. This method is a good way to help kids understand addition as the sum of two (or more) numbers. Kids also have an opportunity to work with place values when adding or subtracting, or to mentally add and subtract with a place value model available at the bottom of the screen. An emphasis on place value models helps kids visualize more advanced concepts like regrouping.
Unfortunately, some gameplay controls are frustrating: For example, tapping the screen for larger addends, such as 9 or 10, can be very difficult. If you don't tap all of your fingers on-screen at once, you may get the answer wrong. Writing answers with a finger is also a challenge: The app often doesn't recognize a handwritten number, even if it's written properly. These glitches can distract kids from an otherwise valuable learning experience.
Key Standards Supported
Number And Operations In Base Ten
Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.
Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
Operations And Algebraic Thinking
Represent addition and subtraction with objects, fingers, mental images, drawings2, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
Fluently add and subtract within 5.
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two one-digit numbers.
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