①: 1.9 2.6 0.8 1.2 0.53 0.26 1 1.2 1/2 1/3 12 1/ 12

②:& lt； = & gt=

③: The weight of apples and pears.

100 times 2/3=200/3 (kg) answer ...

The weight of pears and the weight of apples.

100 divided by 2/3=300 (kg) a ......

④: 60 divided by 80 = 3/4- copper wire

(80-60) divided by 60 = 1/3- copper is longer than iron.

answer ......

Page 59:

①: 3 times 40= 120 (km)

120 divided by 50=2.4 (hours)

answer ......

②: 3600 divided by (400+500)=4 (days)

answer ......

③: 9-3 = 6 (km)

6 times 2.4= 14.4 (yuan)

14.4+8=22.4 (yuan)

answer ......

④: [120 times (1-30%)] times 4=336 (person)

[80 times (1-30%)]2 times =56 (person)

(336+56) times 3= 1 176 (person)1500 > 1 176

A: No. ..

Please forgive me if there is anything wrong. The teacher didn't say anything either.

{Do not copy}