Question

Calculati : {80 - [80 - (80 - 78)]} : 2 b) [(457 + 343 ):100 + 4 × (216-37)] × (180 : 45 - 2 )

Answer 1

a) {80-[80-(80-78)]}:2=
=[80-(80-2)]:2
=(80-78):2
=2:2
=1

b)[(457+343):100+4x(216-37)]x(180:45-2)=
=(800:100+4x179)x(4-2)
=(8+716)x2
=724x2
=1448

Succes!!