77 a 27 × 75 + 25 × 27 – 150 = 27 × (75 + 25) – 150 = 27 × 100 – 150 = 2700 – 150 = 2550 b 12 : {390 : [500 – (125 + 35 × 7)]} = 12 : {390 : [500 – (125 + 245)]} = 12 : [390 : (500 – 370)] = 12 : (390 : 130) = 12 : 3 = 4 Reply
`a) 27 . 75 + 25 . 27 – 150` `= 27 . (75 + 25) – 150` `= 27 . 100 – 150` `= 2700 – 150` `= 2550` `b) 12 : {390 : [500 – (125 + 35 × 7)]}` `= 12 : {390 : [500 – (125 + 245)]}` `= 12 : [390 : (500 – 370)]` `= 12 : (390 : 130)` `= 12 : 3` `= 4` Reply
77
a 27 × 75 + 25 × 27 – 150
= 27 × (75 + 25) – 150
= 27 × 100 – 150
= 2700 – 150
= 2550
b 12 : {390 : [500 – (125 + 35 × 7)]}
= 12 : {390 : [500 – (125 + 245)]}
= 12 : [390 : (500 – 370)]
= 12 : (390 : 130)
= 12 : 3
= 4
`a) 27 . 75 + 25 . 27 – 150`
`= 27 . (75 + 25) – 150`
`= 27 . 100 – 150`
`= 2700 – 150`
`= 2550`
`b) 12 : {390 : [500 – (125 + 35 × 7)]}`
`= 12 : {390 : [500 – (125 + 245)]}`
`= 12 : [390 : (500 – 370)]`
`= 12 : (390 : 130)`
`= 12 : 3`
`= 4`