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Six times, math class assignments, People's Education Edition 55 56 answers plus process speed.
55. 1. 1/3 4/3 4 4/3

2 ( 1)4/5 1/4 (2) 25 16

3 60÷5= 12 (times) 12×5/2=30 (km)

4 1- 1/3- 1/4 = 5/ 1245÷ 180 = 1/4 180 X5/ 12 = 75。

5 3÷ 1/4 = 12(L)3+ 12x 1/6 = 5(L) 12-5 = 7(L)。

56 1. Local port: 96÷20≈5

5×0.8=4

Field: 5× 1.2=6

2、 1 1

3. Fixed telephone: 0.9 mobile phone: 1.8