Question

6. Calculează respectând regulile învățate. a) 8+5 × [20+ 3x (2+4×6)-15)-3-7 b) [150 + 12x 8-(14x2-40:4)] × 10-P c) 5+5 x [5+2x (5 + 25x 1-24:4)]=[?]​

Answer 1

a) =8+5×[20+3×(2+24)-15]-3-7

=8+5×(20+3×26-15)-3-7

=8+5×(20+78-15)-3-7

=8+5×(98-15)-3-7

=8+5×83-3-7

=8+415-3-7

=423-3-7

=420-7

=413

b) = [ 150 + 96- (28 - 10 )] × 10

= ( 150 +96 - 18 ) × 10

=( 246-18 ) × 10

= 228 × 10

= 2280

c) =5+5 ×[ 5+2 ×(5+25 - 6)]

= 5+5 × [5+2×(30-6)]

=5+5 × (5+2×24)

=5+5×(5+48)

=5+5×53

=5+ 265

= 270