Объяснение:
(2 3/4+2 1/5)×16=
1) 2 3/4+2 1/5=(2+2)+(15/20+4/20)=
=4+19/20=4 19/20
2) 4 19/20×16=99/20×16/1=396/5=79 1/5=
=79,2
1 8/17:(12/17+2 7/11)=
1) 12/17+2 7/11=2+ (132/187+119/187)=
=2 +251/187=2+1 64/187=3 64/187
2) 1 8/17:3 64/187=25/17:625/187=
=25/17×187/625=11/25=0,44
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Объяснение:
(2 3/4+2 1/5)×16=
1) 2 3/4+2 1/5=(2+2)+(15/20+4/20)=
=4+19/20=4 19/20
2) 4 19/20×16=99/20×16/1=396/5=79 1/5=
=79,2
1 8/17:(12/17+2 7/11)=
1) 12/17+2 7/11=2+ (132/187+119/187)=
=2 +251/187=2+1 64/187=3 64/187
2) 1 8/17:3 64/187=25/17:625/187=
=25/17×187/625=11/25=0,44