Question

using metric units to find area
directions use the formula to find the area of each figure.
write your answer on the line. include the unit in your answer.
area = length × width

1. (4.5 m)(2 m)=
2. (9 cm)(7 cm)=
3. (22 m)(40 m)=
4. (10 mm)(11 mm)=
5. (2.5 cm)(6.5 cm)=
6. (15 mm)(25 mm)=

directions write the missing number on the line. be sure to include the unit in the answer.

1. 6 m × ______________ = 48 m²
2. 12 cm × 18 cm = ______________
3. 14 mm × ______________ = 1,400 mm²
4. 120 m × 17 m = ______________
5. 8.5 mm × 3.5 mm = ______________
6. 35 m × 30 m = ______________
7. 4 cm × ______________ = 56 cm²
8. 20 cm × 20 cm = ______________
9. ______________ × 70 m = 140 m²

Explanation:

Step1: Calcular áreas rectangulares

1. $(4.5\ m)(2\ m)=9\ m^{2}$
2. $(9\ cm)(7\ cm)=63\ cm^{2}$
3. $(22\ m)(40\ m)=880\ m^{2}$
4. $(10\ mm)(11\ mm)=110\ mm^{2}$
5. $(2.5\ cm)(6.5\ cm)=16.25\ cm^{2}$
6. $(15\ mm)(25\ mm)=375\ mm^{2}$

Step2: Encontrar lados desconocidos

1. $48\ m^{2}\div6\ m = 8\ m$
2. $(12\ cm)(18\ cm)=216\ cm^{2}$
3. $1400\ mm^{2}\div14\ mm = 100\ mm$
4. $(120\ m)(17\ m)=2040\ m^{2}$
5. $(8.5\ mm)(3.5\ mm)=29.75\ mm^{2}$
6. $(35\ m)(30\ m)=1050\ m^{2}$
7. $56\ cm^{2}\div4\ cm = 14\ cm$
8. $(20\ cm)(20\ cm)=400\ cm^{2}$
9. $140\ m^{2}\div70\ m = 2\ m$

Answer:

1. $9\ m^{2}$
2. $63\ cm^{2}$
3. $880\ m^{2}$
4. $110\ mm^{2}$
5. $16.25\ cm^{2}$
6. $375\ mm^{2}$
7. $8\ m$
8. $216\ cm^{2}$
9. $100\ mm$
10. $2040\ m^{2}$
11. $29.75\ mm^{2}$
12. $1050\ m^{2}$
13. $14\ cm$
14. $400\ cm^{2}$
15. $2\ m$