3 / 4-7 / 2 + (- 1 / 6) + (- 2 / 3) - 1

3 / 4-7 / 2 + (- 1 / 6) + (- 2 / 3) - 1

=3／4+14／4-1／6-4／6-1
=17／4-11／6=51／12-22／12=29／12

Find the unknown X: 3 / 1-x,

3.5 of 1-x = 7 of 10
①1-3.5/x=7/10
3.5/x=1-7/10=3/10
X = 3.5 × 10 / 3 = 11 and 2 / 3
②3.5/﹙1-x﹚=7/10
2﹙1-x﹚=10
x=﹣4

Calculation: (0.0081) - 14-10 × 0.02713 + lg14-lg25___ ．

(0.0081) - 14-10 × 0.02713 + lg14-lg25 = 140.0081 & nbsp; - 10 × 30.027 & nbsp; + LG (14 △ 25) = 10.3 & nbsp; - 10 × 0.3 + LG (0.01) = 103-3-2 = - 53, so the answer is: - 53

39 out of 26 can be reduced to?

39 out of 26 can be reduced to 3 out of 2

39:26 ratio
39 ：26
Ratio

First, write out the prime factors of two numbers, and the least common multiple is equal to the product of all their prime factors (if several prime factors are the same, compare which of the two numbers has more prime factors, and multiply them more times). < br > then the least common multiple is 2 * 3 * 5 * 13 = 390

Ratio: 39:91

39:19=3:7

130 kg: 39 / 100 tons 39 / 91 ratio

1:3 3:7

The simplest score of 39 out of 91

7/3

39:91 how to simplify?
Grade 6 or above

Divide the numerator and denominator by 13 to get 3:7

The reduction ratio is 45 / 25, 39 / 91, 60 / 84 and 72 / 48

Hello
45/25=9/5
39/91=3/7
60/84=5/7
72/48=3/2
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