Nyambura walked from home to school every morning and back home via the market every evening. What is the distance does she cover in a week Give your answer in decimetres.

Hatua ya 1: Badilisha umbali wote kuwa desimita (dm). Tunatumia viwango vifuatavyo vya ubadilishaji: $1 \, m = 10 \, \text{dm}$ $1 \, cm = 0.1 \, \text{dm}$ $1 \, hm = 1000 \, \text{dm}$ $1 \, dam = 100 \, \text{dm}$

• Kutoka Nyumbani hadi Shuleni: $2 \, m \, 8 \, dm \, 5 \, \text{cm}$ $2 \, m = 2 \times 10 \, dm = 20 \, dm$ $5 \, cm = 5 \times 0.1 \, dm = 0.5 \, dm$ Jumla ya umbali kutoka Nyumbani hadi Shuleni = $20 \, dm + 8 \, dm + 0.5 \, dm = 28.5 \, \text{dm}$

• Kutoka Shuleni hadi Sokoni: $13 \, \text{dm}$ (tayari iko katika desimita)

• Kutoka Sokoni hadi Nyumbani: $11 \, hm \, 9 \, \text{dam}$ $11 \, hm = 11 \times 1000 \, dm = 11000 \, dm$ $9 \, dam = 9 \times 100 \, dm = 900 \, dm$ Jumla ya umbali kutoka Sokoni hadi Nyumbani = $11000 \, dm + 900 \, dm = 11900 \, \text{dm}$

Hatua ya 2: Kokotoa jumla ya umbali unaofunikwa kwa siku moja. Nyambura huenda Nyumbani $\to$ Shuleni asubuhi, na Shuleni $\to$ Sokoni $\to$ Nyumbani jioni. Kwa hivyo, umbali wa kila siku = (Nyumbani hadi Shuleni) + (Shuleni hadi Sokoni) + (Sokoni hadi Nyumbani) $Umbali wa kila siku = 28.5 \, dm + 13 \, dm + 11900 \, dm$ $Umbali wa kila siku = 11941.5 \, dm$

Hatua ya 3: Kokotoa jumla ya umbali unaofunikwa kwa wiki moja. Wiki ina siku 7. $Umbali wa wiki = Umbali wa kila siku \times 7$ $Umbali wa wiki = 11941.5 \, dm \times 7$ $Umbali wa wiki = 83590.5 \, dm$

Jibu la mwisho ni: $83590.5 \, \text{dm}$ 3 done, 2 left today. You're making progress.