5/6 - 3/22 =(5 × 11 - 3 × 3)= 55/66 - 9/66 = 46/66 = 23/33
11/18 - 11/12 = 22/36 - 33/36 = - 11/36
7/8 - 3/14 = 49/56 - 12/56 = 37/56
23дм-57см+4м8дм9см=230см-57см+489см=662см=6м6дм2см
450*2= 900( астр)
2000-450-900=650( г.)
<span>выражение:450а+ 900b+ 650c</span>
1) 54 : -6 = - 9
2) 24 * - 5 = -120
3) - 9 - (-120) = - 9 + 120 = 111
4) 111 : ( -3) = - 37