Question

calculeaza 1.a)-17+23+15-33+12
b) 76-105+24-8-7
c)-211+101+110-25
d)136-128-8-12+13
2.
a)-(-54+21)+(-19+21)-(54+17)+2
b)-(-7+15-67)+(-67-7+15)+10
c)[-9+13-(-9+13-10)]-(-7+17)
d)(-11+37-42)+(-37+45+11)-5
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Answer 1

Răspuns:

1.

a)

-17-33=-50

-50+15=-35

23+12=35

-35+35=0

b)

76+24=100

100-105=-5

-5-8-7=-20

c)

101+110=211

211-211=0

0-25=-25

d)

-8-12=-20

13-20=-7

128-7=121

136-121=15

2.

a) 33+2-71+2=-34

b)-(-59)+(-59)+10=59-59+10=10

c)[-9+13-(-6)]-10=[-9+13+6]-10=13-3-10=0

d)(11+37)[(-1+1-42)+(-1+45+1)]-5=48*(-42+45) -5= 48*3 -5=144-5=139

Explicație pas cu pas: