计算．1-37+47777×9+111×37x8-14.5=5.50.25×4÷0.25×44×79÷4×790.3×2÷0.3×2．

Question

计算．

1-(3)/(7)+(4)/(7)	777×9+111×37	(x)/(8)-14.5=5.5
0.25×4÷0.25×4	4×(7)/(9)÷4×(7)/(9)	0.3×2÷0.3×2．

Answer 1

①1-(3)/(7)+(4)/(7)
=(4)/(7)+(4)/(7)
=1(1)/(7)
②777×9+111×37
=（111×7）×9+111×37
=111×63+111×37
=111×（63+37）
=111×100
=11100
③(x)/(8)-14.5=5.5
(x)/(8)-14.5+14.5=5.5+14.5
          (x)/(8)=20
       (x)/(8)×8=20×8
          x=160
④0.25×4÷0.25×4
=0.25÷0.25×4×4
=1×4×4
=16．
⑤4×(7)/(9)÷4×(7)/(9)
=4×(7)/(9)×(1)/(4)×(7)/(9)
=(49)/(81)
⑥0.3×2÷0.3×2
=0.6÷0.3×2
=4