Pls potrzebuje te 3 zad pomoże ktoś daje 50 pkt.

Zad. 1. a) 6.3/8 - 2.5/8 = 5.11/8 - 2.5/8 = 3.6/8 = 3.3/4 b) 2.2/3 + 3.4/5 = 2.10/15 + 3.12/15 = 5.22/15 = 6.7/15 c) 3/4 * 8/9 = 24/36 = 8/13 d) 5.1/2 * 2.3/4 = 11/2 * 11/4 = 121/8 = 15.1/8 e) 2/7 : 3/14 = 2/7 * 14/3 = 28/21 = 1.7/21 = 1.1/3 f) 6.1/2 : 3.1/4 = 13/2 : 13/2 = 13/2 * 2/13 = 26/26 = 1 g) 88,7 - 9,36 = 79,34 h) 3,24 * 1,8 = 5,832 i) 7,83 * 10 = 78,3 j) 183,5 : 100 = 1,835 k) 3,2 : 0,8 = 4 Zad. 2. a) (-13) - 12 = (-25) b) 7 - 13 = (-6) c) 14 - (-16) = 30 d) (-56) : (-2) = 28 Zad. 3. a) (3/4 - 1/5) : 1/2 = (15/20 - 4/20) : 1/2 = 11/20 : 1/2 = 11/20 * 2/1 = 22/20 = 1.2/20 = 1.1/10 b) 5 - 4 * 3/4 = 5 - 12/4 = 5 - 3 = 2 c) 1/2 * 3/4 - 0,5 * 0,7 = 2/4 * 3/4 - 5/10 * 7/10 = 6/16 - 35/100 = 6/16 - 7/20 = 120/360 - 112/360 = 8/360 = 1/45 Pozdrawiam ;D

[latex]1.\a) 6frac{3}{8}-2frac{5}{8} = 5frac{11}{8}-2frac{5}{8} = 3frac{6}{8} = 3frac{3}{4}\\b) 2frac{2}{3}+3frac{4}{5} = 2frac{10}{15} + 3frac{12}{15} = 5frac{22}{15} = 6frac{7}{15}\\c) frac{3}{4}cdotfrac{8}{9} = frac{2}{3}\\d) 5frac{1}{2}cdot2frac{3}{4} = frac{11}{2}cdotfrac{11}{4} = frac{121}{8} = 15frac{1}{8}\\e) frac{2}{7}:frac{3}{14} = frac{2}{7}cdotfrac{14}{3} = 2cdotfrac{2}{3} = frac{4}{3} = 1frac{1}{3}[/latex] [latex]f) 6frac{1}{2}:3frac{1}{4} = frac{13}{2}:frac{13}{4}=frac{13}{2}cdotfrac{4}{13} = frac{4}{2} = 2\\g) 88,7 - 9,36 = 79,34\\h) 3,24cdot1,8 = 5,832\\i) 7,83cdot10 = 78,3\\j) 183,5:100 = 1,835\\k) 3,2:0,8 = 32:8 = 4[/latex] [latex]2.\a) -13-12 = -(13+12) = -25\\b) 7-13 = -(13-7) = -6\\c) 14-(-16) = 14 + 16 = 30\\d) (-56):(-2) = 28[/latex] [latex]3.\a) (frac{3}{4}-frac{1}{5}):frac{1}{2} = (frac{15}{20}-frac{4}{20})cdot2 = frac{11}{20}cdot2 = frac{11}{10} = 1frac{1}{10}\\b) 5 - 4cdotfrac{3}{4} = 5-3 = 2\\c) frac{1}{2}cdotfrac{3}{4}-0,5cdot0,7 =frac{3}{8}-0,35 = 0,375-0,35 = 0,025=frac{25}{1000} = frac{1}{40}[/latex]