標題:
p5 Maths
發問:
用列式作答 42÷6/7 8/9÷2/3 3 3/8÷1 1/2 4 1/6÷2 1/2 5/12÷1/6 5/63÷1 2/3 2 1/4÷3/4 15 2/5÷4/15 9 3/8÷1 1/4 7 1/2÷1 11/14
最佳解答:
42÷6/7 = 42 x 7/6 =7 x 7 =49 8/9÷2/3 =8/9 x 3/2 =4/3 3 3/8÷1 1/2 =27/8÷3/2 =27/8 x 2/3 =9/4 =2 1/4 4 1/6÷2 1/2 =25/6÷5/2 =25/6 x 2/5 =5/3 =1 2/3 5/12÷1/6 =5/12 x 6 =5/2 =2 1/2 5/63÷1 2/3 =5/63÷5/3 =5/63 x 3/5 =1/21 2 1/4÷3/4 =9/4÷3/4 =9/4 x 4/3 =3 15 2/5÷4/15 =77/5÷4/15 =77/5 x 15/4 =77 x 3/4 =231/4 =57 3/4 9 3/8÷1 1/4 =75/8÷5/4 =75/8 x 4/5 =15/2 =7 1/2 7 1/2÷1 11/14 =15/2÷25/14 =15/2 x 14/25 =3 x 7/5 =21/5 =4 1/5 ok?
其他解答:
42÷6/7=42×7/6=49 8/9÷2/3=8/9×3/2=4/3 3 3/8÷1 1/2=27/8×2/3=9/4 4 1/6÷2 1/2=25/6×2/5=5/3 5/12÷1/6=5/12×6=5/2 5/63÷1 2/3=5/63×3/5=1/21 2 1/4÷3/4=9/4×4/3=3 15 2/5÷4/15=77/5×15/4=231/4 9 3/8÷1 1/4=75/8×4/5=15/2 7 1/2÷1 11/14 =15/2×14/25=21/5 2007-05-23 11:00:39 補充： 將所有帶分數轉為假分數將所有除分數轉為乘之後再約簡就OK~^^|||||1.42÷6/7 = 42 x 7/6 = 49 2 8/9÷2/3 = 8/9 x 3/2 = 24/ 18 = 4/3 ( or 1/1/3 ) 3. 3 3/8÷1 1/2 = 要上課, lunch 再補充
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