Răspuns :
Răspuns:
1a)(7,5+2,5)×2=20cm;b)(8+5,5)×2=27m;2c)(0,14+0,196)×2=0,672;2d)(400+300)×2=1400; 2)L=(3-1×2)=(3-2)÷2=1÷2=0,5;3)(18+14)×2=64; 64÷4=16
Răspuns:
1a)(7,5+2,5)×2=20cm;b)(8+5,5)×2=27m;2c)(0,14+0,196)×2=0,672;2d)(400+300)×2=1400; 2)L=(3-1×2)=(3-2)÷2=1÷2=0,5;3)(18+14)×2=64; 64÷4=16