1. 100 cm - 30 dm = ..........m. 2. 500 m - 100 cm=...........dm

≡ penyelesaian :

nomor 1.)

= 100 cm - 30 dm
= ( 100 ÷ 100 ) m - ( 30 ÷ 10 ) m
= ( 1 - 3 ) m
= - 2 m

nomor 2.)

= 500 m - 100 cm
= ( 500 × 10 ) dm - ( 100 ÷ 10 ) dm
= ( 5000 - 10 ) dm
= 4090 dm [tex]~[/tex]