179+181 помогите 6кл. Created by irinakasanova62. matematika-ru

179+181 помогите 6кл...

irinakasanova62 @irinakasanova62

July 2022 1 5 Report

179+181 помогите 6кл

Answers & Comments

Леонидович

Ответ:

Пошаговое объяснение:

179) -8,3-a

1) $a=-3,8=>-8,3-(-3,8)=-8,3+3,8=-4,5$

2) $a=4,2=>-8,3-4,2=-12,5$

3) $a=6\frac{1}{3}=6+\frac{1}{3} =>-8,3-(6+\frac{1}{3})=-8,3-6-\frac{1}{3}=-14-(\frac{3}{10}+\frac{1}{3} )=-14-(\frac{9}{30}+\frac{10}{30} )=-14\frac{19}{30}$

4) $a=-4\frac{4}{15}=-4-\frac{4}{15} =>-8,3-(-4-\frac{4}{15})=-8,3+4+\frac{4}{15}=-4-(\frac{3}{10}-\frac{4}{15} )=-4-(\frac{9}{30}-\frac{8}{30} )=-14\frac{1}{30}$

181)

1) -47+83-35+69=-45-2+80+2-35+70=35+35-70

2) 2,13-6,8-0,64=2,13-7,44=-5,31

3) -0,76-(-0,55)+(-2,34)+9,2=-0,76+0,55-2,34+9,2=-3,1+9,75=6,65

4) -14,37-11,64-(-23,85)+(-18,03)=-14,37-11,64+23,85-18,03=-43-(0,37+0,64+0,03)+23,85=-44,04+23,85=-20,19

5) $4\frac{2}{3} +(-2\frac{8}{15} )-(-2\frac{3}{5} )=4\frac{2}{3} -2\frac{8}{15} +2\frac{3}{5}=4-2+2+\frac{2}{3} -\frac{8}{15} +\frac{3}{5}=4+\frac{10-8+9}{15} =4+\frac{11}{15}$

6) $4\frac{2}{3} -(-3\frac{3}{4} )+(-2\frac{5}{6} )-5\frac{1}{8} =4\frac{2}{3} +3\frac{3}{4}-2\frac{5}{6} -5\frac{1}{8}=4+3-2-5+\frac{2}{3} +\frac{3}{4}-\frac{5}{6} -\frac{1}{8}=\frac{16+18-20-3}{24} =\frac{11}{24}$

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