Overview: 7 questions will be solved this time.Among them
☆7 fraction calculations
[ 1/7 Fraction calculation ]
Question type: Fractional addition
Original question: 1/2+2/3 Solution:
Divide two fractions with defferent denominators:The denominators of two fractions are 2 and 3 respectively,their least common multiple is 6
Divide the least common multiple 6 by the denominator 2 of the first addend to get 3
Multiply the numerator 1 and denominator 2 of the first fraction by 3
Then divide the least common multiple 6 by the denominator 3 of the second addend to get 2
Multiply the numerator 2 and denominator 3 of the second fraction by 2 Calculation result: [ 2/7 Fraction calculation ]
Question type: Fractional addition
Original question: 3/8+5/24 Solution:
Divide two fractions with defferent denominators:The denominators of two fractions are 8 and 24 respectively,their least common multiple is 24
Divide the least common multiple 24 by the denominator 8 of the first addend to get 3
Multiply the numerator 3 and denominator 8 of the first fraction by 3
Then divide the least common multiple 24 by the denominator 24 of the second addend to get 1
Multiply the numerator 5 and denominator 24 of the second fraction by 1 Calculation result: The calculation result is reduced by 2[ 3/7 Fraction calculation ]
Question type: Fractional subtraction
Original question: 2/3-1/4 Solution:
Divide two fractions with defferent denominators:The denominators of two fractions are 3 and 4 respectively,their least common multiple is 12
Divide the least common multiple 12 by the denominator 3 of the minuend to get 4
Multiply the numerator 2 and denominator 3 of the subtracted number by 4
Then divide the least common multiple 12 by the denominator 4 of the subtraction to get 3
Multiply the subtracted numerator 1 and denominator 4 by 3 at the same timeCalculation result: [ 4/7 Fraction calculation ]
Question type: Fractional subtraction
Original question: 4/9-1/3 Solution:
Divide two fractions with defferent denominators:The denominators of two fractions are 9 and 3 respectively,their least common multiple is 9
Divide the least common multiple 9 by the denominator 9 of the minuend to get 1
Multiply the numerator 4 and denominator 9 of the subtracted number by 1
Then divide the least common multiple 9 by the denominator 3 of the subtraction to get 3
Multiply the subtracted numerator 1 and denominator 3 by 3 at the same timeCalculation result: [ 5/7 Fraction calculation ]
Question type: Fractional addition
Original question: 1/12+1/4 Solution:
Divide two fractions with defferent denominators:The denominators of two fractions are 12 and 4 respectively,their least common multiple is 12
Divide the least common multiple 12 by the denominator 12 of the first addend to get 1
Multiply the numerator 1 and denominator 12 of the first fraction by 1
Then divide the least common multiple 12 by the denominator 4 of the second addend to get 3
Multiply the numerator 1 and denominator 4 of the second fraction by 3 Calculation result: The calculation result is reduced by 4[ 6/7 Fraction calculation ]
Question type: Fractional addition
Original question: 3/4+2/5 Solution:
Divide two fractions with defferent denominators:The denominators of two fractions are 4 and 5 respectively,their least common multiple is 20
Divide the least common multiple 20 by the denominator 4 of the first addend to get 5
Multiply the numerator 3 and denominator 4 of the first fraction by 5
Then divide the least common multiple 20 by the denominator 5 of the second addend to get 4
Multiply the numerator 2 and denominator 5 of the second fraction by 4 Calculation result: [ 7/7 Fraction calculation ]
Question type: Fractional subtraction
Original question: 4/9-5/18 Solution:
Divide two fractions with defferent denominators:The denominators of two fractions are 9 and 18 respectively,their least common multiple is 18
Divide the least common multiple 18 by the denominator 9 of the minuend to get 2
Multiply the numerator 4 and denominator 9 of the subtracted number by 2
Then divide the least common multiple 18 by the denominator 18 of the subtraction to get 1
Multiply the subtracted numerator 5 and denominator 18 by 1 at the same timeCalculation result: The calculation result is reduced by 3
>>注:本次最多计算 7 道题。
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