Question

⑭ $7\\ \text{kg}\\ 200\\ \text{g} = \underline{\quad\quad\quad}\\ \text{g} + \underline{\quad\quad\quad}\\ \text{g}$
$= \underline{\quad\quad\quad}\\ \text{g}$

write in kilograms and grams.
⑮ $1,800\\ \text{g} = \underline{\quad\quad\quad}\\ \text{g} + \underline{\quad\quad\quad}\\ \text{g}$
$= \underline{\quad\quad\quad}\\ \text{kg}\\ \underline{\quad\quad\quad}\\ \text{g}$

⑯ $6,600\\ \text{g} = \underline{\quad\quad\quad}\\ \text{g} + \underline{\quad\quad\quad}\\ \text{g}$
$= \underline{\quad\quad\quad}\\ \text{kg}\\ \underline{\quad\quad\quad}\\ \text{g}$

⑰ $3,100\\ \text{g} = \underline{\quad\quad\quad}\\ \text{g} + \underline{\quad\quad\quad}\\ \text{g}$
$= \underline{\quad\quad\quad}\\ \text{kg}\\ \underline{\quad\quad\quad}\\ \text{g}$

⑱ $4,900\\ \text{g} = \underline{\quad\quad\quad}\\ \text{g} + \underline{\quad\quad\quad}\\ \text{g}$
$= \underline{\quad\quad\quad}\\ \text{kg}\\ \underline{\quad\quad\quad}\\ \text{g}$

⑲ $2,700\\ \text{g} = \underline{\quad\quad\quad}\\ \text{g} + \underline{\quad\quad\quad}\\ \text{g}$
$= \underline{\quad\quad\quad}\\ \text{kg}\\ \underline{\quad\quad\quad}\\ \text{g}$

⑳ $5,500\\ \text{g} = \underline{\quad\quad\quad}\\ \text{g} + \underline{\quad\quad\quad}\\ \text{g}$
$= \underline{\quad\quad\quad}\\ \text{kg}\\ \underline{\quad\quad\quad}\\ \text{g}$

㉑ $6,300\\ \text{g} = \underline{\quad\quad\quad}\\ \text{g} + \underline{\quad\quad\quad}\\ \text{g}$
$= \underline{\quad\quad\quad}\\ \text{kg}\\ \underline{\quad\quad\quad}\\ \text{g}$

Explanation:

Step1: Convert kg to g (Q14)

Recall $1\ \text{kg}=1000\ \text{g}$, so $7\ \text{kg}=7\times1000=7000\ \text{g}$
$7\ \text{kg}\ 200\ \text{g}=7000\ \text{g} + 200\ \text{g}$

Step2: Sum the grams (Q14)

$7000+200=7200\ \text{g}$

Step3: Split into 1000g + remainder (Q15)

$1800\ \text{g}=1000\ \text{g} + 800\ \text{g}$

Step4: Convert 1000g to kg (Q15)

$1000\ \text{g}=1\ \text{kg}$, so $1800\ \text{g}=1\ \text{kg}\ 800\ \text{g}$

Step5: Split into 1000g multiples (Q16)

$6600\ \text{g}=6000\ \text{g} + 600\ \text{g}$

Step6: Convert 6000g to kg (Q16)

$6000\ \text{g}=6\times1000=6\ \text{kg}$, so $6600\ \text{g}=6\ \text{kg}\ 600\ \text{g}$

Step7: Split into 1000g + remainder (Q17)

$3100\ \text{g}=3000\ \text{g} + 100\ \text{g}$

Step8: Convert 3000g to kg (Q17)

$3000\ \text{g}=3\times1000=3\ \text{kg}$, so $3100\ \text{g}=3\ \text{kg}\ 100\ \text{g}$

Step9: Split into 1000g + remainder (Q18)

$4900\ \text{g}=4000\ \text{g} + 900\ \text{g}$

Step10: Convert 4000g to kg (Q18)

$4000\ \text{g}=4\times1000=4\ \text{kg}$, so $4900\ \text{g}=4\ \text{kg}\ 900\ \text{g}$

Step11: Split into 1000g + remainder (Q19)

$2700\ \text{g}=2000\ \text{g} + 700\ \text{g}$

Step12: Convert 2000g to kg (Q19)

$2000\ \text{g}=2\times1000=2\ \text{kg}$, so $2700\ \text{g}=2\ \text{kg}\ 700\ \text{g}$

Step13: Split into 1000g + remainder (Q20)

$5500\ \text{g}=5000\ \text{g} + 500\ \text{g}$

Step14: Convert 5000g to kg (Q20)

$5000\ \text{g}=5\times1000=5\ \text{kg}$, so $5500\ \text{g}=5\ \text{kg}\ 500\ \text{g}$

Step15: Split into 1000g + remainder (Q21)

$6300\ \text{g}=6000\ \text{g} + 300\ \text{g}$

Step16: Convert 6000g to kg (Q21)

$6000\ \text{g}=6\times1000=6\ \text{kg}$, so $6300\ \text{g}=6\ \text{kg}\ 300\ \text{g}$

Answer:

1. $7000\ \text{g} + 200\ \text{g} = 7200\ \text{g}$
2. $1000\ \text{g} + 800\ \text{g} = 1\ \text{kg}\ 800\ \text{g}$
3. $6000\ \text{g} + 600\ \text{g} = 6\ \text{kg}\ 600\ \text{g}$
4. $3000\ \text{g} + 100\ \text{g} = 3\ \text{kg}\ 100\ \text{g}$
5. $4000\ \text{g} + 900\ \text{g} = 4\ \text{kg}\ 900\ \text{g}$
6. $2000\ \text{g} + 700\ \text{g} = 2\ \text{kg}\ 700\ \text{g}$
7. $5000\ \text{g} + 500\ \text{g} = 5\ \text{kg}\ 500\ \text{g}$
8. $6000\ \text{g} + 300\ \text{g} = 6\ \text{kg}\ 300\ \text{g}$