450+200*45=450+9000=9450
3000*(1000+1286)=3000*2286=5286
2016/8*2016=252*2016=508032
1)4×3=12 (весь моток)
Ответ:12 метров
100,200,300,400,500,600,700,800,900.
6,2t-20,15+19,03-7,5t=6,2t-7,5t-20,15+19,03=-1,3t-1,12
=(20/48+33/48)*(-72/13)=53/48*(-72/13)=-159/26=-6 3/26
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2) (9\14 -( 5\21 )) : (-2 9\14 ) =(27/42-10/42):(-37/14)=17/42*(-14/37)=-17/111
3) ( - 4 11\18 - 2 7\12 ) : ( -3 1\12 ) =(-83/18-31/12):(-37/12)=(-166/36-93/36)*(-12/37)=-259/36*(-12/37)=7/3=2 1/2
4) ( 7\16 - 31\40 ) : (- 17\24 + 27\40 ) =(35/80-62/80):(-85/120+81/120)=-27/80:(-4/120)=-27/80*(-30)=81/8=10 1/8
5) - 3.3\4 - ( - 8 . 2\9 -(-4.5 ) : 9\14 ) * 2. 1\4=-1
1)-4,5:9/14=-9/2*14/9=-7
2)-8 2/9-(-7)=-1 2/9
3) -1 2/9*2 1/4=-11/9*9/4=-11/4=-2 3/4
4)-3 3/4-(-2 3/4)=-1