Question

Tính bằng cách thuận tiện nhất (254 + 435) + 565 3,27 + 7,45 + 6,73 5/9 + ( 4/7 + 4/9 )

Answer 1

` (254 + 435) + 565 = 254 + ( 435+565)=254+1000=1254.`

 

`3,27 + 7,45 + 6,73= (3,27+6,73)+7,45= 10+7.45=17,45.`

 

`5/9 + ( 4/7 + 4/9 )= (5/9+4/9)+4/7=9/9+4/7= 1+4/7=11/7.`

Answer 2

a: =254+1000=1254

b: =3,27+6,73+7,45=10+7,45=17,45

c: =5/9+4/9+4/7=1+4/7=11/7