Răspuns :
400+480:4[680:2+4·(20+12+18)
=400+480:4+(680:2+4·50)
=409+480:4+540=
=1060
=400+480:4+(680:2+4·50)
=409+480:4+540=
=1060
1)36+9:(5+4)=36+9:9=36+1=37
2)Deseneaza o dreapta paralela cu notati:a,b:
a______
b______
3)70+50+35*(35*4+65)=70+50+35*(140+65)=
120 +35*205=
120+7175=
7395
4)1+2+3+...+2017
2017+2016+2015+...+1
S=2017*2016:2
S=2017*1008
S=2033126
2)Deseneaza o dreapta paralela cu notati:a,b:
a______
b______
3)70+50+35*(35*4+65)=70+50+35*(140+65)=
120 +35*205=
120+7175=
7395
4)1+2+3+...+2017
2017+2016+2015+...+1
S=2017*2016:2
S=2017*1008
S=2033126