Răspuns:
22. 42 cm---------42×4=168 cm
5 cm------------20÷4=5
150 cm--------150×4=520 cm
9cm---------36÷4=9
130×2+70×2=260+140=400
240×2+160×2=480+320=800
220-100×2=220-200=20 20÷2=10 latimea
138-19×2=138-38=130 130÷2=65 lungimea
Explicație pas cu pas:
