Matematyka wokół nas z.3/188podr. tylko a) prosze jak najszybciej
1. (-12)+(-8)-(+7)-(9)=
2. 8-(-9)+ (-11)-(+5)=
3. (-21)+(-7)-(+15)-(32)=
4.-(-13)+(-2)-(+16)+(-5)=
wiem tylko,że w :
1. powinno wyjśc:-18
2.1
3.-11
4.-10
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1. (-12)+(-8)-(+7)-(9)=(-20)-7-9=(-20)-(-2)=-18
2. 8-(-9)+ (-11)-(+5)=17+(-11)-5=6-5=1
3. (-21)+(-7)-(+15)-(32)=(-28)-15-32=(-28)-(-17)=-11
4. -(-13)+(-2)-(+16)+(-5)=13+(-2)-16+(-5)=13+(-2)-16+(-5)=-10
liczę na naj
1. (-12)+(-8)-(+7)-(9)=( -20)- 7 - 9= (-20) - (-2) = (-20) + 2 = -18
2. 8-(-9)+ (-11)-(+5)= 8 + 9 -11 - 5 = 17 - 11 - 5 = 1
3. (-21)+(-7)-(+15)-(32)= (-28)-(+15)-(32)= (-28) - 15 - 32 = (-28) - (-17) = -11
4.-(-13)+(-2)-(+16)+(-5)= 13 + (-2)- (+16) + (-5)= 13 - 2 - 16 + (-5) = (-5) + (-5) = -10