Question

1,2,3,4, va rog macar 1 ,2,4
3 îl fac singură ajutor va rog​

Answer 1

Răspuns:

1.a) 2/5+1/5=3/5

7/9+2/9=9/9

20/100+60/100=80/100

b) 3/9+2/9+2/9=7/9

2/3+2/3+2/3=6/3

c) 8/10-2/10=6/10

10/8-5/8=5/8

80/100-30/100=50/100

d)18/10-4/10-6/10=8/10

3/7+3/7-2/7=4/7

2. a) 8/8, 10/8,9/8,13/8,11/8,12/8,14,8

b) 6/9,2/9,3/9,1/9,4/9,5/9

4) 4/10-2/10=2/10

4/7-2/7=2/7

4/8-1/8=3/8

8/11-3/11=5/11

5) 3/8+5/8=8/8= 1 întreg

Fracția 5 supra 8 reprezintă nr. de pagini pe care le mai are Irina de citit pt. a termina cartea.

Answer 2

Răspuns:

ex 1

$\frac{2}{5} + \frac{1}{5} = \frac{3}{5}$

$\frac{7}{9} + \frac{2}{9} = \frac{9}{9}$

$\frac{20}{100} + \frac{60}{100}$

$\frac{3}{9} + \frac{2}{9} + \frac{2}{9} = \frac{7}{9}$

$\frac{2}{3} + \frac{2}{3} + \frac{2}{3} = \frac{6}{3}$

$\frac{8}{10} - \frac{2}{10} = \frac{6}{10}$

$\frac{10}{8} - \frac{5}{8} = \frac{5}{8}$

$\frac{80}{100} - \frac{30}{100} = \frac{50}{100}$

$\frac{18}{10} - \frac{4}{10} - \frac{6}{10} = \frac{8}{10}$

$\frac{3}{7} + \frac{3}{7} - \frac{2}{7} = \frac{4}{7}$

ex 2

a)

$\frac{7}{8} + \frac{1}{8} = \frac{8}{8}$

$\frac{7}{8} + \frac{3}{8} = \frac{10}{8}$

$\frac{7}{8} + \frac{2}{8} = \frac{9}{8}$

$\frac{7}{8} + \frac{6}{8} = \frac{13}{8}$

$\frac{4}{8} + \frac{5}{8} = \frac{9}{8}$

$\frac{7}{8} + \frac{7}{8} = \frac{14}{8}$

b)

$\frac{9}{9} - \frac{3}{9} = \frac{6}{9}$

$\frac{5}{9} - \frac{3}{9} = \frac{2}{9}$

$\frac{6}{9} - \frac{3}{9} = \frac{3}{9}$

$\frac{4}{9} - \frac{3}{9} = \frac{1}{9}$

$\frac{7}{9} - \frac{3}{9} = \frac{4}{9}$

$\frac{8}{9} - \frac{3}{9 } = \frac{5}{9}$

ex 3

$\frac{9}{10} = \frac{5}{10} + \frac{4}{10}$

$\frac{6}{7} = \frac{5}{7} + \frac{1}{7}$

$\frac{8}{9} = \frac{2}{9} + \frac{6}{9}$

$\frac{2}{2} = \frac{1}{2} + \frac{1}{2}$

ex 4

nu stiu