Пошаговое объяснение:
1. 3/2×4/3×6/5×7/6=14/5; 14/5-1/2=28/10-5/10=23/10=2 3/10;
2. 5/4×6/5×7/6×8/7×9/8=9/4; 9/4-1/4=8/4=2;
3. 5/2×7/5×9/7×11/9×13/11=13/2; 13/2+1/2=14/2=7
4.7/3×11/7×15/11×19/15×23/19=23/3; 23/3-2/3=21/3=7
Пошаговое объяснение:
1. 3/2×4/3×6/5×7/6=14/5; 14/5-1/2=28/10-5/10=23/10=2 3/10;
2. 5/4×6/5×7/6×8/7×9/8=9/4; 9/4-1/4=8/4=2;
3. 5/2×7/5×9/7×11/9×13/11=13/2; 13/2+1/2=14/2=7
4.7/3×11/7×15/11×19/15×23/19=23/3; 23/3-2/3=21/3=7