Current location - Training Enrollment Network - Mathematics courses - Sixth grade mathematics: the corn planting area in Qinghe township 128 hectares, accounting for 2/5 of the cultivated land in the township. How many hectares of arable land are there in Qinghe Townshi
Sixth grade mathematics: the corn planting area in Qinghe township 128 hectares, accounting for 2/5 of the cultivated land in the township. How many hectares of arable land are there in Qinghe Townshi
Sixth grade mathematics: the corn planting area in Qinghe township 128 hectares, accounting for 2/5 of the cultivated land in the township. How many hectares of arable land are there in Qinghe Township? 1, solution: both 128÷2/5.

= 128*5/2

=64*5

=320()

A:

2. Solution: The total length is 120( 1-5/7).

= 120÷2/7

= 120*7/2

=60*7

=420

A: