（598.1×37

2

5

+5981×6.26）÷1

13

17

+190×

17

30

=（598.1×37.4+598.1×62.6）÷

30

17

+190×

17

30

=598.1×（37.4+62.6）×

17

30

+190×

17

30

=598.1×100×

17

30

+190×

17

30

=

17

30

×（59810+190）
=

17

30

×60000
=34000