How to write the calculation power of division vertical in grade
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For example: 15 / 3 = 5
< H2 > extended data such as 42 divided by 7
divide from 4 [from high to low]. When the division is calculated in vertical form, the division starts from the highest position, for example, 42 starts from the highest ten digits 4; If not
for example, if 4 cannot be divided by 7, the highest bit and the next bit are combined into a number to divide it until it can be divided by the divisor; For example: in 42 divided by 7, 4 cannot divide by 7, so 4 and 2 are combined into a number 42 to divide by 7, and the quotient is 6
solution idea: divide each digit of the divisor from the high position, keep the quotient of each calculation, and add the remainder to the next digit to calculate, so the divisor will be calculated in this order, and the quotient will be combined in order, and the remainder is the last operation result
solution process:
Step 1: 8 ÷ 4 = 2, the remainder is: 0
Step 2: 4 ÷ 4 = 1, the remainder is 0
according to the above calculation steps, the combined result is 21
checking calculation: 4 × 21 = 84
extended data $checking result: first align the last digit of the two multipliers, then use the second multiplier respectively, multiply each digit from the last digit in turn, and finally accumulate the calculated result to be the proct. If the multiplier is a decimal, first expand it by the corresponding multiple, and finally rece the corresponding multiple
problem solving process:
Step 1: 1 × 4 = 4
Step 2: 2 × 4 = 80
according to the above calculation results, the sum is 84
if you have any doubt, please ask, if you are satisfied, please accept
solution idea: divide each digit of the divisor from the high position, keep the quotient of each calculation, and add the remainder to the next digit for operation, so the divisor will be calculated in this order, so the quotient will be combined in order, and the remainder is the last operation result
solution process:
Step 1: 8 ÷ 4 = 2, the remainder is: 0
Step 2: 7 ÷ 4 = 1, the remainder is: 3
according to the above calculation steps, the combination result is 21, the remainder is 3
checking calculation: 21 × 4 + 3 = 87
extended data - & gt; Checking results: four operation rules (calculation in order, multiplication and division before addition and subtraction, bracket before bracket, and multiplier before square) that is, disjunction operation (recursive equation calculation) should be carried out under the premise of the principle
problem solving process:
21 × 4 + 3
= 84 + 3
= 87
if in doubt, please ask, if satisfied, please adopt
solution idea: divide each digit of the divisor from the high position, keep the quotient of each calculation, and add the remainder to the next digit to calculate, so the divisor will be calculated in this order, and the quotient will be combined in order, and the remainder will be the last operation result
solution process:
Step 1: 4 ÷ 3 = 1, the remainder is: 1
Step 2: 12 ÷ 3 = 4, the remainder is 0
according to the above calculation steps, the combined result is 14
checking calculation: 3 × 14 = 42
extended data (checking result): first align the last digit of the two multipliers, then use the second multiplier respectively, multiply each digit from the last digit in turn, and finally accumulate the calculated results to be the proct. If the multiplier is a decimal, it can be expanded by the corresponding multiple first, and finally the proct can be reced by the corresponding multiple
problem solving process:
Step 1: 4 × 3 = 12
Step 2: 1 × 3 = 30
according to the above calculation results, the sum is 42
if you have any doubt, please ask, if you are satisfied, please accept
An example of division writing sequence is as follows:
42 divided by 7
divide from 4 [from high to low]. When the division is calculated in vertical form, the division starts from the highest position, for example, 42 starts from the highest ten digits 4; If not
for example, if 4 cannot be divided by 7, the highest bit and the next bit are combined into a number to divide it until it can be divided by the divisor; For example: in 42 divided by 7, 4 cannot divide by 7, so 4 and 2 are combined into a number 42 to divide by 7, and the quotient is 6
extended data:
vertical calculation method
1, addition
align the same digits, if the sum exceeds 10, advance 1 The number of digits should be aligned.) For example:
435
+ 697
- -
1132
2, subtraction
align the same digit, if not enough, borrow 1 from the previous digit as 10. For example:
756
- 569
-- -
187
reference: network vertical
36÷9=4
除法竖式像下面这样列式：
—
< 4 × 2003132
< 32
—
< 0
Example of vertical division in grade 2 of primary school:
12 ÷ 2=6