1/4+3/4=4/4=1
1/7+5/7=6/7
4/9+2/9=6/9=2/3
8/76+13/76=21/76
4/5+1/5=5/5=1
6/7-4/7=2/7
3/10-1/10=2/10=1/5
2 2/3-2/3=2
4 5/6-3/6=4 2/6=4 1/3
3/8-2/8=1/8
3/7*4/5=12/35
1/2*2/3=2/6=1/3
5/6*3/6=15/36=5/12
7/11*3/11=21/121
33/41*2/5=66/205
3/4:2/3=9/8=1 1/8
4/7:6/10=20/21
5/9:1/3=5/3=1 2/3
9/13:3/4=12/13
23/45:4/7=161/180
26х-0,8=7
26х=7+0,8
26х=7,8
х=7,8:26
х=0,3
(2 4/9) × а, при а = 2 2/11
2 4/9 · 2 2/11 = 22/9 · 24/11 = (2·8)/(3·1) = 16/3 = 5 целых 1/3
- - - - - - - - - - - -
(2 2/11) × b, при b = 2 4/9
2 2/11 · 2 4/9 = 24/11 · 22/9 = (8·2)/(1·3) = 16/3 = 5 целых 1/3
<span>(25+35х)÷15=4</span>
<span>25+35х=4</span>*15
35x=60-25
35x=35
x=1