<span>2/7 × х = 1,8
x=1,8:2/7
x=18/10*7/2
x=63/10
x=6 3/10
</span>
1.
3 1/20=61/20=3,05; 2 3/50=103/50=2,06; 4 8/25=108/25=4,32;
7 11/20=151/20=7,55; 12 4/25=304/25=12,16; 9 13/50=463/50=9,26.
2.
2 5/8=21/8=2,625; 1 6/125=131/125=1,048; 3 17/200=617/200=3,085;
8 9/250=2009/250=8,036; 7 3/500=3503/500=7,006; 6 7/8=55/8=6,875;
4 9/125=509/125=4,072; 5 111/200=1111/200=5,555
1. 48
2. 20
3. 6
4. 210
5. 302
6. 120