123m+42dam+3km+99mm= dam​

Satuan Panjang

_________________

-Km

–hm

—dam

—-m

—–dm

——cm

——-mm

keterangan:

turun 1 × = dikali 10

naik 1× = dibagi 10

Pembahasan soal:

________________

123m + 42dam + 3km + 99mm = dam

•ubah semua ke satuan dam kecuali 42dam karena sudah satuan panjangnya sudah dam. diperoleh:

123m ÷ 10 = 12,3 dam

42dam = 42dam

3km × 100 = 300dam

99mm ÷ 10.000 = 0,0099dam

maka,

123m + 42dam + 3km + 99mm =…dam

= (12,3 + 42 + 300 +0,0099)dam

= 354,3099dam

→ 123 m + 42 dam + 3 km + 99 mm

→ (123÷10) + 42 + (3×100) + (99÷10.000) dam

→ 12,3 + 42 + 300 + 0,0099 dam

→ 354,3099 dam