13 Oblicz.
a) 7,25 * 0,2 + 3,2
b) 47,8 * 2,25 + 3,46 * 8,25
c) 18,75 - 12,31 * 4 - 20,25
d) 3,6 * 2,78 + 9,25 * 5,85 + 9,25 * 0,25
e) (7,33 * 2 + 5,34) - (6,41 * 1,8 + 8,462)
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a. 4.65
b.137.58
c.-50.74
d.66.42
e.0
a) 7,25 *0,2 +3,2 = 1,45 +3,2 =4,65
b) 47,8*2,25 +3,46 *8,25= 107,55 + 28,545 = 136,095
c) 18,75 -12,31 *4 -20,25= 18,75 -49,24 -20,25 = -50,74
d) 3,6*2,78-9,25*5,85+9,25*0,25= 10,008 - 54,1125 +2,3125 = -41,792
e) (7,33*2+5,34)-(6,41*1,8 +8,462) = (14,66 +5,34) -(11,538 +8,462) = 20 - 20 = 0