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a fost răspuns

a) 2 3/4×(1 2/33-2 1/3)÷(-3 1/2) b) [-0,4+0,(6)]×(-1 1/4)÷0,(3).

Răspuns :

Spidie
2 3/4×(1 2/33-2 1/3)÷(-3 1/2)=11/4×(35/33-7/3)÷(-7/3) =11/4×(35/33-77/33)÷(-7/3) =11/4×(-42/33)*3/7 =11/4*6/11=6/4=3/2

b) [-0,4+0,(6)]×(-1 1/4)÷0,(3)= (-2/5+2/3)×(-5/4)÷1/3= (-6/15+10/15)×
(-5/4)÷1/3= 4/15×(-5/4)×3= -1/3×3= -3/3= -1










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