Ответы на вопрос:
1)1 2/9 × 2 3/12 = 11/9 × 9/4 = 11/4 = 2 3/4 2) 4 1/9 - 2 3/4 = 37/9 - 11/4 =(37 × 4 - 11 × 9)/36 = 148/36 - 99/36 = 49/36 = 1 13/36 ответ : 1 13/36
41/9 - 1 2/9 * 2 3/12 = 1 целая 13/36 1) 1 2/9 * 2 3/12 = 11/9 * 27/12 = (11*3)/(1*12) = 33/12 = 2 9/12 2) 4 1/9 - 2 9/12 = 4 4/36 - 2 27/36 = 3 40/36 - 2 27/36 = 1 13/36
(580: b-25)*90+490=850(580: b-25)*90 = 850-490 (580: b-25)*90 = 360 580: b-25 = 360/90 580: b-25 = 4 580: b = 4+25 580: b = 29 b = 580/29 b = 20
Популярно: Математика
-
kirill03131228.09.2021 02:31
-
Yaryycher04.07.2020 07:30
-
nnnnnastasi17.04.2021 22:44
-
vishnevskayaya11.02.2023 10:13
-
S1mplendnnd12.03.2023 10:59
-
elena221330.06.2020 12:44
-
yuriayato15.05.2021 19:17
-
Ali042913.02.2020 16:24
-
olgamorozkina1915.09.2021 16:07
-
1955715.02.2022 07:27