Răspuns:
Explicație pas cu pas:
a) ( - 21)×( - 8) ×3×(-25) = (-21)×3×(8×25) = (-63)×200 = - 12600
b) ( - 5)×(-25)×(-2)×(-4) = 1000
= +(5×2) ×(25×4) =
= 10 × 100 =
= 1000
c) (-13)×52 + 48×( -13) = (-13)×(52+48) = (-13)×100 = - 1300
d) 29×(-125) - 29×(-124) = 29×(-125 + 124) = 29 × ( -1) = - 29
e) - 5×13 + (-5)×17 = (-5) × ( 13+17) = (-5)×30 = - 150
f) 9 × ( - 18) - 9 ×22 = 9 × ( - 18 - 22) = 9 ×(-40) = - 360
g) ( -23)×(-15) - 23×16 = ( -23) × ( - 15+ 16) = ( -23) × 1 = - 23
h) 54 × ( -35) - 74 × ( -35) = (-35) × (54-74) = (-35)×(-20) = 700
