Răspuns:
1.a)4-12=-8
b)-3-7=-10
c)7-5=2
d)-6-8=-14
2.a)-5×6=-30
b)-7×(-3)=21
c)42:(-7)=-6
d)72×9=648
3.a)(-7)²=49
b)(-2)³=-8
c)(-1)²⁰²⁰=1
d)-6²=-36
4.a)(7+3×4)-(5+5×4)=(7+12)-(5+20)
19-25=-6
b)-3[2-(-6)²:(-9)]-2×[6-(-8)]=
-3[2-36:(-9)]-2×(6+8)=
-3(2+4)-2×14=-18-28=-46
c)[(-5)²(-1-4)⁴(3-8)³]⁵:(-5)⁴³=
[5²×5⁴×(-5)³]⁵:(-5)⁴³=(-5⁹)⁵:(-5)⁴³=
(-5)⁴⁵:(-5)⁴³=(-5)²=25
d)[-25:(-5)+27:(-9)]×3=
(5-3)×3=2×3=6
e[-3)²⁹:3²⁸+2×(-5)]:13+(-11)⁰
(-3-10):13+1=-13:13+1=1+1=2
f)[l-3²+(-3)³l-(-3)+(-2)×(4-6)]:(-3)=
[3²l-1-3l+3-2(-2)]:(-3)=
(3²×4+3+4):(-3)=(36+7):3=39/3
bonus
(-5)²⁰⁵¹(5×5²×5³×5⁴...5⁹⁹×5¹⁰⁰)=
-5²⁰⁵¹×(5¹+²+³+...+⁹⁹+¹⁰⁰)
1+2+3+...99+100=100×101/2=
50×101=5050
E=-5^(2051+5050)=5^⁷¹⁰¹
