Question

a) (2,05+1,75)-(1+0,2)
b) (4,38+2,52)×(3,4+0,6)
c) 0,75+0,1×(2,8-1,1)
d) 1,2²+1,2×(3,4+0,6)

Answer 1

a) (205/100 +175/100) - (1 +2/10) =
380/100 - 12/10 =
380 /100 - 120/100 = 260/100 = 2,6

b) (438/100+252/100) x (34/10 +6/10)=
690 /100 x 40/10= (69 x 4 ) / 10 = 276/10 = 27,6

C)75/100 +1/10 x  (28/10 - 11/10) =
75/100 + 17/100 = 92/100 = 0,92

d)(12/10)² + 12/10 x (34/10 +6/10) =
144/100 + 12/10 x 40/10 =
144/100 + 480/100 = 624/100 = 6,24