Пошаговое объяснение:
№ 777
1) 2 4/7 = ( 2*7+4)/7=18/7
2) 3 5/12=( 3*12+5)/12=41/12
3) 4 7/20 = (4*20+7)/20=87/20
4) 6 11/24= (6*24+11)/24=155/24
5) 7 23/100= (7*100+23)/1000= 723/100
6) 10 16/27 = (10*27+16)/27=286/27
№ 778
1) 4 3/4 = (4*4+3)/4=19/4
2) 9 6/11= (9*11+6)/11=105/11
3) 3 9/17= (3*17+9)/17=60/17
4) 12 5/6 = ( 12*6+5)/6=77/6
5) 13 49/100= ( 13*100+49)/100= 1349/100
6) 8 3/16 = ( 8*16+3)//16=131/16
№ 779
1) 8+ 4/21 = 8 4/21
2) 5 16/19 +3 5/19 = ( 5+3)+(16/19+5/19)= 8 21/19 = 9 2/19
3) 7 7/16 - 3 3/16 = ( 7-3) + ( 7/16 -3/16) = 4 + 4/16 = 4 4/16 = 4 1/4
4) 10 12/17 + 5 4/17 - 3 3/17 = ( 10+5-3)+( 12/17+4/17-3/17)= 12 + 13/17= 12 13/17
№ 780
1) 14/93 +5 = 5 14/93
2) 6 17/41+ 7 19/41 = 13 36/41
3) 24 9/38 - 17 5/38 = (24-17)+ ( 9/38 - 5/38)= 7 4/38= 7 2/19
4) 15 7/10 - 2 4/10 + 6 1/10 = ( 15-2+6) + ( 7/10 -4/10+1/10)= 19 4/10= 19 2/5
Пошаговое объяснение:
№ 777
1) 2 4/7 = ( 2*7+4)/7=18/7
2) 3 5/12=( 3*12+5)/12=41/12
3) 4 7/20 = (4*20+7)/20=87/20
4) 6 11/24= (6*24+11)/24=155/24
5) 7 23/100= (7*100+23)/1000= 723/100
6) 10 16/27 = (10*27+16)/27=286/27
№ 778
1) 4 3/4 = (4*4+3)/4=19/4
2) 9 6/11= (9*11+6)/11=105/11
3) 3 9/17= (3*17+9)/17=60/17
4) 12 5/6 = ( 12*6+5)/6=77/6
5) 13 49/100= ( 13*100+49)/100= 1349/100
6) 8 3/16 = ( 8*16+3)//16=131/16
№ 779
1) 8+ 4/21 = 8 4/21
2) 5 16/19 +3 5/19 = ( 5+3)+(16/19+5/19)= 8 21/19 = 9 2/19
3) 7 7/16 - 3 3/16 = ( 7-3) + ( 7/16 -3/16) = 4 + 4/16 = 4 4/16 = 4 1/4
4) 10 12/17 + 5 4/17 - 3 3/17 = ( 10+5-3)+( 12/17+4/17-3/17)= 12 + 13/17= 12 13/17
№ 780
1) 14/93 +5 = 5 14/93
2) 6 17/41+ 7 19/41 = 13 36/41
3) 24 9/38 - 17 5/38 = (24-17)+ ( 9/38 - 5/38)= 7 4/38= 7 2/19
4) 15 7/10 - 2 4/10 + 6 1/10 = ( 15-2+6) + ( 7/10 -4/10+1/10)= 19 4/10= 19 2/5