602-398=204;
The vertical calculation is as follows:
Vertical subtraction When the column is vertical, the numbers should be aligned, one for each number, ten for each number, and so on. If the number of minuets is not reduced enough, borrow 1 from the previous number as 10, and then subtract it.
Extended data:
Subtraction is one of the four operations, and the operation of subtracting one number from another is called subtraction; Given the sum of two addends and one of them, the operation of finding the other addend is called subtraction. The symbol of subtraction is "-",which is pronounced as negative sign.
Subtraction is a mathematical operation that represents the operation of removing an object from a collection. Its symbol is the minus sign (? )。 For example, in the picture on the right, there are five? 2
Apples, five apples, two were taken away, leaving three apples. So 5? 2 =
3。 Subtraction is to remove or reduce physical quantities and abstract quantities with different objects (including negative numbers, fractions, irrational numbers, vectors, decimals, functions and matrices).
Subtraction follows several important patterns. It is anti-commutative, which means that changing the order will change the sign of the answer. It is not associative law, that is, when a subtraction exceeds two numbers, the order of subtraction is very important. Subtracting 0 does not change a number.
Subtraction also follows predictable rules related to addition and multiplication. These laws can be proved, starting with the subtraction of integers and summarizing them with real numbers and other things. Continue the general binary operation of these patterns and learn in abstract algebra.
Vertical type means that each transition number is changed by the last transition number, and then the single digits of the last transition number are multiplied by 2. If carry is needed, proceed to 1, then increase the unit number by ten digits, and so on, and add a new operand to the unit number.
Longitudinal formula refers to a longitudinal formula in the calculation process, which makes the calculation simple.
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