Question

12). (30-27:3)•2+5•12]•2=?
13). [(3•4+4)•8+40]:8=?​

Answer 1

Explicație pas cu pas:

12)

1)27:3=9

2)30-9=21

3)5•12=60

4)21•2=42

5)42+60=102

6)102•2=204

13)

1)3•4=12

2)12+4=16

3)16•8=128

4)128+40=168

5)168:8=21

sper că te-am ajutat

Answer 2

[( 30 - 27 : 3 ) × 2 + 5 × 12 ] × 2 =

[( 30 - 9 ) × 2 + 60 ] × 2 =

( 21 × 2 + 60 ) × 2 =

( 42 + 60 ) × 2 =

102 × 2 = 204

[( 3 × 4 + 4 ) × 8 + 40 ] : 8 =

[( 12 + 4 ) × 8 + 40 ] : 8 =

( 16 × 8 + 40 ) : 8 =

( 128 + 40 ) : 8 =

168 : 8 = 21