CULEGERE DE EXERCIŢII ŞI PROBLEME PENTRU CL. a III-a

c) ( 28 + 26 ) : 6 = d) ( 54 – 27 ) : 3 =
( 18 + 14 ) : 4 = ( 67 – 18 ) : 7 =
( 46 + 17 ) : 9 = ( 86 – 59 ) : 3 =
( 32 + 16 ) : 4 = ( 43 – 27 ) : 8 =
67. Calculaţi-l pe m:
a) ( 63 + m ) : 9 = 9 b) ( 25 + m ) : 9 = 6
( 19 + m ) : 6 = 8 ( 36 + m ) : 8 = 9
( m + 9 ) : 6 = 5 ( m + 28 ) : 5 = 7
( m +18 ) : 4 = 7 ( m + 37 ) : 4 = 10
c) (100 – m ) : 9 = 9 d) ( 75 – m ) : 6 = 8
( 66 – m ) : 6 = 5 ( 81 – m ) : 7 = 6
( m – 18 ) : 9 = 6 ( m – 37 ) : 7 = 9
( m – 78 ) : 8 = 9 ( m – 90 ) : 8 = 8
68. Verificaţi egalităţile:
a) ( 36 + 36 ) : 9 = ( 82 – 10 ) : 8
( 24 + 48 ) : 8 = ( 27 + 18 ) : 9
( 27 + 45 ) : 9 = ( 14 + 22 ) : 4
( 17 + 39 ) : 8 = ( 30 + 19 ) : 7
b) ( 35 + 28 ) : 7 = ( 18 + 9 ) : 3
( 16 + 64 ) :10 = ( 9 + 15 ) : 3
( 38 – 18 ) : 5 = ( 81 – 45 ) : 9
( 92 – 38 ) : 6 = ( 39 + 24 ) : 7
69. Calculaţi:
a) ( 24 + 8 ) : 4 + ( 36 + 18 ) : 6 =
20 – ( 37 + 5 ) : 6 + 117 : 9 =
93 + ( 35 + 21 + 16 ) : 8 – 3 x 4 =
69