Question

Rezolvați problema
Dau coroniță clasa 4

Answer 1

prima zi=3/8
a doua zi= 3/8-2/8=1/8
a treia zi= 1/8+1/8=2/8
a patra zi=(168-3/8-1/8-2/8):2=167,25:2=83,625
a cincea zi=167,25:2=83,625

Answer 2

Cat a arat in prima zi?
3/8 din 168=168:8x3=21x3=63 mp

Cat a arat in a doua zi?
3/8-2/8=1/8;
1/8 din 168=168:8x1=21 mp

Cat a arat a treia zi?
1/8+1/8=2/8;
2/8 din 168=168:8x2=21x2=42 mp

Cat a arat in a patra si a cincia zi?
168-(63+21+42)=168-126=42mp

Cat a lucrat in a patra zi?
42:2=21 mp

Cat a lucrat in a cincia zi?
42:2=21 mp

Nota:
mp=metri patrati

Proba:
63+21+42+21+21=168