Question

Помогите решить 347 номер

Answer 1

а)3/6 + 2/6=5/6
в)8/12 + 3/12 = 11/12
д)30/42 - 7/42=23/42
ж)1/8 + 2/8=3/8
б)3/12 + 8/12=11/12
г)15/20 + 820=23/20
е)9/12 - 4/12=512
з)6/9 - 5/9=1/9

Answer 2

$frac{1}{2} + frac{1}{3} = frac{3+5}{6} = frac{5}{6} \ frac{2}{3}+ frac{1}{4}= frac{4*2+3}{12} = frac{11}{12} \ frac{5}{7}- frac{1}{6} = frac{6*5-7}{42} = frac{23}{42} \ frac{1}{8}+ frac{1}{4}= frac{2+4}{16} = frac{6}{16} \ frac{1}{4}+ frac{2}{5}= frac{5+2*4}{20} = frac{13}{20} \ frac{3}{4}+ frac{2}{5}= frac{3*5+2*4}{20} = frac{23}{20} \ frac{3}{4} - frac{1}{3} = frac{3*3-4}{12} = frac{5}{12} \ frac{2}{3}- frac{5}{9}= frac{2*3-5}{9} = frac{1}{9}$

Answer 3

* это умножить

Answer 4

да