1÷ 1= 1 2÷2= 1 3÷3= 1 4÷4= 1 5÷5= 1 6÷6= 1 7÷7= 1 8÷8= 1 9÷9= 1
2÷ 1=2 4÷2=2 6÷3=2 8÷4=2? 10÷5=2? 12÷6=2? 14÷7=2? 16÷8=2? 18÷9=2
3÷ 1=3 6÷2=3 9÷3=3? 12÷4=3 15÷5=3? 18÷6=3? 2 1÷7=3 24÷8=3? 27÷9=3
4÷ 1=4 8÷2=4 12÷3=4 16÷4=4? 20÷5=4? 24÷6=4? 28÷7=4 32÷8=4 36÷9=4
5÷ 1=5 10÷2=5? 15÷3=5 20÷4=5? 25÷5=5 30÷6=5 35÷7=5 40÷8=5 45÷9=5
6÷ 1=6 12÷2=6 18÷3=6 24÷4=6 ? 30÷5=6 36÷6=6 42÷7=6 48÷8=6 54÷9=6
7÷ 1=7 14÷2=7 2 1÷3=7 28÷4=7 35÷5=7 42÷6=7 49÷7=7 56÷8=7 63÷9=7
8÷ 1=8 16÷2=8 24÷3=8 ? 32÷4=8 40÷5=8 48÷6=8 ? 56÷7=8 64÷8=8 72÷9=8
9÷ 1=9 18÷2=9 27÷3=9 ? 36÷4=9 45÷5=9 54÷6=9 63÷7=9 72÷8=9 8 1÷9=9
Learning method: children's songs of multi-digit division in second grade mathematics.
Multi-digit division nursery rhymes
Integer division starts from the high order. Divide by a few and see how many there are.
This is not enough to see the next one, except which one is for business.
The remainder is less than the divisor, which is not enough for quotient one zero.
In mathematics, when the first-level operation (addition and subtraction) and the second-level operation (multiplication and division) are in the same formula at the same time, their operation order is multiplication and division first, then addition and subtraction. If there are parentheses, the order of operations at the same level is from left to right. Such operations are called four operations.
The fourth refers to the calculation rules of addition, subtraction, multiplication and division. The expressions of four operations do not necessarily have four operation symbols. Generally, it refers to the operation of combining the majority into a number with two or more operation symbols and brackets.
Addition: the operation of combining two numbers into one number/two decimals into one decimal/two fractions into one decimal.
Subtraction: The operation of finding the other addend by knowing the sum of two addends and one of them.
Multiplication: A simple operation to find the sum of several identical addends. The meaning of decimal multiplication by integer is the same as that of integer multiplication. Multiplying a number by a pure decimal means finding a few tenths and a few percent of this number ... The meaning of multiplying a fraction by an integer is the same as that of integer multiplication.
Division: the operation of finding another factor by knowing the product of two factors and one of them. Same meaning as integer division.
For example:
1 multiplication: ① How much is yes; (2) How many times is a number; ③ Find the area and volume of the object; (4) Find the fraction or percentage of a number.
2 Division: ① Divide a number into several parts and find out one of them; (2) How many other numbers are there in a number; (3) What fraction or percentage of a number is known to find this number; (4) Find a number that is several times that of another number.
3 addition: ① summation; ② Subtraction inverse operation.
4 subtraction: ① seek the remainder; ② comparison; ③ Inverse addition operation.
Addition and subtraction are reciprocal operations; Multiplication and division are reciprocal operations; Multiplication is a simple operation of addition.