Question

Oblicz x : x+23=41, 26+x=45, 72-x=46, x-42=19, (19+12)+x=52, (98-19)=26,48:x=6, x:7=12 Oblicz pamiętając o kolejności wykorzystania działań: 42:[(30-9)*2]=, 14-36:[(27-24)*4]=,(51+5):7+2*[(18+9):3]=, 27:9+3*8=,(18+12):3+2*9=, (42-37)*6+(28-7):3=, 8*9:6+45:15*2=, (7-4)3:3 +(17-12)2*2=, (27:9-1)2+(6*5-24)2=,52*(8-4)+(12-7)*23= prosze o szybka odp. daje naj naj

Answer 1

Oblicz : 

x + 23 = 41 ----> 41 - 23 =18 -----> x = 18

26 + x= 45 ------> 45 - 26 = 19 -----> x = 19

72 - x =46 -------> 72- 46 = 26 ------> x = 26 

x - 42 = 19 -------> 42 + 19 = 61 ------> x = 61 

(19 + 12) + x = 52 -----> 31 + x = 52 ------> 52 - 31 =21 ------> x = 21 

48 : x = 6 --------> 48 : 6 = 8 ------> x = 8 

x : 7 = 12 -----> 12 * 7 = 84 -------> x = 84 

 

Oblicz :

42 : [(30 - 9)*2]=42 : [21 * 2]=42 : 42 = 1

(51 + 5):7 + 2 *[(18+ 9 ) : 3 = ( 51 + 5) : 7 + 2 * 9 = 56 : 7 + 2 * 9 = 8 + 18 = 26

27 : 9 + 3 * 8 = 3 + 24 = 27 

(18 + 12):3+2*9=30 : 3 + 2*9=10 + 18= 28 

( 42 - 37)*6+(28 - 7) : 3= 5 * 6 + 21 =30 + 21 = 51

8 * 9 : 6+45:15*2=72 : 6 +45:15*2=12 + 3 * 2 = 12 + 6 = 18

  sorki ale dalej nie mam czasu .