А) 84*108/(48*126)=84/48 *108/126=7/6 *6/7=1
Б) 96*35*100/(33*80*105)=96/33 * 35/105 *100/80=32/11*1/3*5/4=40/33
-27/20×(-5/9)-5/24×(-22/5) =1 2/3
1)-27/20×(-5/9)=27×5/20×9=3/4
2)-5/24×(-22/5)=5×22/24×5=11/12
3)3/4+11/12=9/12+11/12=20/12=5/3=1 2/3
Ответ:
1) 12 = 10+2
2) 12+7 = (10+2)+7 = 10+(2+7) = 10+9 = 19
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6+5 = (5+1)+5 = (5+5)+1 = 10+1 = 11
3) 13+6 = (10+3)+6 = 10+(3+6) = 10+9 = 19
15+3 = (10+5)+3 = 10+(5+3) = 10+8 = 18
2 1 3
1200-127*3+8
понятно ?
50.600.034.003
Таков ответ на твой вопрос:-)