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Add numbers from 1 digit to 5 digits with 9 different languages and 3 difficulty levels. you may need a ledger when trading large numbers. do not worry! there's also a scratchboard inside!
Fast, practical and fun. Learning math has never been so easy!
Addition
Addition is when two mathematical expressions (known or unknown numbers and numbers) come together to form a result.
A, B, C => B + B = C, in addition, A and B are the numbers added, and C is called the sum.
Features of the Aggregation Process
1. Cover feature:
The sum of two natural numbers is again a natural number. For a N b N (a + b) N
2. Change feature:
In addition, if the places of the added numbers change, the sum does not change. for a N and b N; A + b = b + a is the variable property of addition.
3. Merging feature:
In finding the sum of the three natural numbers, the sum of the two desired terms can be summed up by the third. The merger property, a + (b + c) = (a + b) + c If there is a positive number k that satisfies the equation a = b + k; It is said that a is greater than b. Shown as a> b. If a and b are any two positive numbers, a = b, ab. A second decimal system operation can be described by successive addition. 5 + 5 + 5 for a N, b N and c N; (a + b) + c = a + (b + c).
4. Ineffective element feature:
The number zero is an ineffective element in a set of natural numbers according to addition.