Пошаговое объяснение:
1 1/4 ·1 1/5=5/4 ·6/5=3/2=1 1/2=1,5
2 1/2 ·2 4/5=5/2 ·14/5=7
2 2/7 ·1 1/8=16/7 ·9/8=(2·9)/7=18/7=2 4/7
1 2/5 ·7 1/2=7/5 ·15/2=(7·3)/2=21/2=10 1/2=10,5
2 1/7 ·2 2/15=15/7 ·32/15=32/7=4 4/7
2 2/9 ·2 19/40=20/9 ·99/40=11/2=5 1/2=5,5
2 1/10 ·2 1/7=21/10 ·15/7=(3·3)/2=9/2=4 1/2=4,5
4 1/6 ·1 2/5=25/6 ·7/5=(5·7)/6=35/6=5 5/6
1 4/7 ·2 6/11=11/7 ·28/11=4
1 1/5 ·2 11/12=6/5 ·35/12=7/2=3 1/2=3,5
7 1/2 ·7 1/15=15/2 ·106/15=53
7 5/9 ·1 1/17=68/9 ·18/17=4·2=8
Пошаговое объяснение:
1 1/4 ·1 1/5=5/4 ·6/5=3/2=1 1/2=1,5
2 1/2 ·2 4/5=5/2 ·14/5=7
2 2/7 ·1 1/8=16/7 ·9/8=(2·9)/7=18/7=2 4/7
1 2/5 ·7 1/2=7/5 ·15/2=(7·3)/2=21/2=10 1/2=10,5
2 1/7 ·2 2/15=15/7 ·32/15=32/7=4 4/7
2 2/9 ·2 19/40=20/9 ·99/40=11/2=5 1/2=5,5
2 1/10 ·2 1/7=21/10 ·15/7=(3·3)/2=9/2=4 1/2=4,5
4 1/6 ·1 2/5=25/6 ·7/5=(5·7)/6=35/6=5 5/6
1 4/7 ·2 6/11=11/7 ·28/11=4
1 1/5 ·2 11/12=6/5 ·35/12=7/2=3 1/2=3,5
7 1/2 ·7 1/15=15/2 ·106/15=53
7 5/9 ·1 1/17=68/9 ·18/17=4·2=8