Выполните действия: а) 6 6/11*3/4: 2 2/5*2 1/5; б) 9:6 1/4*2 1/2:3/5; в)9 1/3:7/8*9/16:14/27; г) 1 5/6:2 1/3 * 3 3/4* 4 1/5. Created by valerochkaavra. matematika-ru

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August 2022 1 9 Report

Выполните действия: а) 6 6/11*3/4: 2 2/5*2 1/5; б) 9:6 1/4*2 1/2:3/5; в)9 1/3:7/8*9/16:14/27;
г) 1 5/6:2 1/3 * 3 3/4* 4 1/5

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prettypushkova

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А) 6 6/11 * 3/4 : 2 2/5 * 2 1/5 = 4 1/2
1) 6 6/11 * 3/4 = 72/11 * 3/4 = 54/11
2) 54/11 : 2 2/5 = 54/11 * 5/12 = 90/44
3) 90/44 * 2 1/5 = 90/44 * 11/5 = 18/4 = 4 1/2

б) 9 : 6 1/4 * 2 1/2 : 3/5 = 6
1) 9 : 6 1/4 = 9 : 6,25 = 1,44
2) 1,44 * 2 1/2 = 1,44 * 2,5 = 3,6
3) 3,6 : 3/5 = 3,6 : 0,6 = 6

в) 9 1/3 : 7/8 * 9/16 : 14/27 = 11 4/7
1) 9 1/3 : 7/8 = 28/3 * 8/7 = 32/3
2) 32/3 * 9/16 = 6
3) 6 : 14/27 = 6 * 27/14 = 81/7 = 11 4/7

г) 1 5/6 : 2 1/3 * 3 3/4 * 4 1/5 = 12 3/8
1) 1 5/6 : 2 1/3 = 11/6 * 3/7 = 11/14
2) 11/14 * 3 3/4 = 11/14 * 15/4 = 165/56
3) 165/56 * 4 1/5 = 165/56 * 21/5 = 99/8 = 12 3/8

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