Question

EXERCITILE 1 2 SI 3 DAU COROANA ,CAT MAI RAPID

Answer 1

1) 
2 + 5 x 7 - 3 x 10 : 10 + 1 x 6 =40
=2 + 35 - 30 : 10 + 6 =
=  37 - 3 + 6 = 
= 34 + 6
= 40

2) 
7 x 9 + ( 15 - 3 ) x 4 + 0 x ( 27 + 28 ) - 1=110
= 63 + 12 x 4 + 0 - 1 =
= 63 + 48 + 0 -1=
= 111 - 1=
= 110

3)
( 8 + 8 x 8 ) : 9 - 9 x ( 6 - 6 : 6 ) : 9 + 3 x 3 x 3= 30
= ( 8 + 64 ) : 9 - 9 x ( 6 - 1) : 9 + 9 x 3 =
= 72 : 9 - 9 x 5 : 9 + 27 = 
= 8 - 45 : 9 + 27 = 
= 8 - 5 + 27 = 
= 3 + 27 = 
 = 30