Question

Tính thuận tiện

a) 234,705 + 45,79 – 34,705 – 10,79

b) 156,703 + 123,41 + 44,297 – 23,41

c) 235,65 – 45,71 + 145,71 – 35,65

d) 425,12 – 134,39 – 65,61 – 25,12

Answer 1

a)  

= (\(234,705 - 34,705\) ) \(-\) ( \(45,79 - 10,79\) )

= \(200 - 35\)

= \(165\)

b)

= ( \(156,703 \) \(+\) \(44,297\) ) \(+\) ( \(123,41 - 23,41\) )

= \(200 + 100\)

= \(300\)

c)

= \((235,65 - 35,65)\) + \((145,71 - 45,71)\)

= \(200 + 100\)

= \(300\)

d)

= \((425,12 - 25,12)\) - \((134,39 + 65,61)\)

= \(400 - 200\)

= \(200\)