Question

oblicz jak najprostszym sposobem

a)105+(-7)+(-13)+20=

b)-16+67+(-10)+(-7)+66=

c)2 2/5+(-4.1+ 7. 3/5 +(5.9)

d) 4 4/7 + 5.4 + (-1. 4/7)+(-7.4)=

e)-0.75+6.3+(-1.1)+(-1/4)+(-6.3)=

za najlepsze daje naj. dzięki

Answer 1

a] 105 + (-7) + (-13) + 20 = 105-7-13+20= 105
b] -16 + 67 + (-10) + (-7) + 66 = -16+67-10-7= 34
c] 2⅖ + (4,1) + 7³/₅ + (-5,9) = 12/5 + 41/10 + 38/5 - 59/10= 82/10= 8,2
d] 4⁴/₇ + 5,4 + (-1⁴/₇) + (-7,4) = 32/7 + 27/5 - 11/7 - 37/5= 175/35+189/35-55/35-259/35=50/35≈1,43
e] -0,75 + 6,3 + (-1,1) + (-¼) + (-6,3) = -3/4 + 63/10 - 11/10 - 1/4= -30/40 +252/40 - 44/10 - 10/40 = 168/40= 4,2

Answer 2

a)98+7=15

b)51+(-17)+66=34+66=100

c)-1.7+13.5=11.8

d)4 i 20/35 + 5 i 14/35 + (-1 i 20/35)+(-7 i 14/35)=9 i  34/35 +  (-8 i 6/35)=1 i 28/35=1.8

e)5.55+(-1.35)+(-6.3)=5.55+(-7.65)=-2.1

 

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