Пошаговое объяснение:
Вычислите:
1) 3/20+2/15=> НОК(20;15)=60 => 3*3/60+2*4/60=9/60+8/60=17/60;
2) 75/32-5/12 => НОК(32;12) = 96 => 75*3/96 - 8*5/96=
=225/96-40/96=185/96;
3) 11/28+9/14=> НОК(28;14)=28=> 11/28+9*2/28=11/28+18/28=29/28;
4) 35/36- 41/45 => НОК(36;45)=180=>35*5/180-4*41/180=175/180-164/180=
= 11/180;
5) 3 21/25+1 2/15 => НОК(25;15)=75=> 3 21*3/75 + 1 2*5/75=4 (63+10)/75=
=4 73/75;
6) 4 13/16-2 3/8 => НОК(16;8)=16=> 4 13/16-2 3*2/16 = 2 (13-6)/16=
=2 7/16;
7) 5 5/6- 31/48 => НОК(6;48)=48=> 5 40/48-31/48 = 5 9/48=5 3/16;
8) 6 4/7-2 37/77=>НОК(7;77)=77=> 6 44/77 - 2 37/77 = 4 7/77=4 1/11.
Пошаговое объяснение:
Вычислите:
1) 3/20+2/15=> НОК(20;15)=60 => 3*3/60+2*4/60=9/60+8/60=17/60;
2) 75/32-5/12 => НОК(32;12) = 96 => 75*3/96 - 8*5/96=
=225/96-40/96=185/96;
3) 11/28+9/14=> НОК(28;14)=28=> 11/28+9*2/28=11/28+18/28=29/28;
4) 35/36- 41/45 => НОК(36;45)=180=>35*5/180-4*41/180=175/180-164/180=
= 11/180;
5) 3 21/25+1 2/15 => НОК(25;15)=75=> 3 21*3/75 + 1 2*5/75=4 (63+10)/75=
=4 73/75;
6) 4 13/16-2 3/8 => НОК(16;8)=16=> 4 13/16-2 3*2/16 = 2 (13-6)/16=
=2 7/16;
7) 5 5/6- 31/48 => НОК(6;48)=48=> 5 40/48-31/48 = 5 9/48=5 3/16;
8) 6 4/7-2 37/77=>НОК(7;77)=77=> 6 44/77 - 2 37/77 = 4 7/77=4 1/11.