Question

Zece babusti mici si zece babusti cantaresc , laolalta , 3 kg.
Cat cantareste o babusca mica si cat cantareste o babusca mare , stiind ca 5 babusti mici cantaresc cu 500 g mai putin decat 5 babusti mari ?
Cat vor cantari 3 babusti mici si 3 babusti mari , la un loc ?

Answer 1

10b+10B=3kg
5b+500g=5B
10B=5B+5B
10B=5b+500g+5b+500g
10B=10b+1000g
1000g=1kg
10b+10b+1kg=3kg
20b=3kg-1kg
20b=2kg
2kg=2000g
20b=2000g
b=2000g÷20
b=100g
5b+500g=5B
5×100g+500g=5B
500g+500g=5B
1000g=5B
B=1000g÷5
B=200g
3B+3b=3×200+3×100=600+300=900g