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Copiaza,apoi calculeaza si scrie in □ snul de realtie corespunzator:
a) 30-(18-12)□(30-18)-12.
b) (50-20)+10□50-(20+10).
c) 24-(8:4)□(24-8):4.
d) (32+32):8□32+(32:8).
Ajutor


Răspuns :

a- 30 -(18 -12 )=30 -6 =24
(30 -18 )-12 =12 -12 =0
30-(18 -12 )>(30-18) -12
b- (50-20)+10 =30 +10 =40
50-(20 +10) = 50-30 =20
(50-20) + 10 >50 -(20 +10)
c- 24 -(8÷4)=24 -2 =22
(24-8) ÷4 = 16 ÷4= 4
24-(8÷4)>(24-8) ÷4
d- (32 +32)÷8 = 64 ÷8 = 8
32+(32 ÷ 8 ) = 32 +4 =36
(32 +32 )÷8 < 32 +(32 ÷ 8 )