G4 Math Multilplication -p.210

G4 Math Multiplication -p.210

(Online Class)

13. The Castillo de San Marcos is a Spanish fortress that was built between 1672 and 1695. It cost 138,375 pesos to build this fortress.

Question: Round to the nearest ten thousand , how many pesos did it cost to build the fortress?

p.210

13.) Round to the nearest ten thousand

Ans. 138,375 - 140,000

13. B. The Castillo de San Marcos is a Spanish fortress that was built between 1672 and 1695. It cost 138,375 pesos to build this fortress.

Question: How many years did it take to build the fortress?

p. 210

Multiple Choice

13. B.The Castillo de San Marcos is a Spanish fortress that was built between 1672 and 1695. It cost 138,375 pesos to build this fortress.

Question: How many years did it take to build the fortress?

• 30 years

• 32 years

• 23 years

built between 1672 and 1695

*counting years in between - use subtraction

13.B.

Ans. 1695 - 1672 = 23

14. A school has 2 large patios. One is rectangular and is 24 feet long by 18 feet wide. The other is square and each side is 21 feet long. Which patio has a greater area?

p.210

Multiple Choice

14. A school has 2 large patios. One is rectangular and is 24 feet long by 18 feet wide. The other is square and each side is 21 feet long. Which patio has a greater area?

• square patio

• rectangular patio

Multiply -Area

14.)

Ans. square patio

24 x 18 = 432 square feet

21 x 21 = 441 square feet

432 < 441 square feet

15. What are the partial products of the given area model?

p.210

Multiple Select

15. What are the partial products of the given area model?

• 20+ 200 + 80 + 8

• 800 + 200 + 8 + 80

• 20+ 800 + 20 + 2

Partial Products

15.)

Ans.

10 x 20 = 200

10 x 2 = 20

4 x 20 = 80

4 x 2 = 8

Partial Products - Review

(HW)

Multiple Select

16. Select all the partial products needed to find the final product.

• 6

• 16

• 18

• 180

• 600

Partial Products

16.) 13 x 62

Ans.

2 x 3 = 6

2 x 10 = 20

60 x 3 =180

60 x 10 = 600

Multiple Select

17. Select all the partial products needed to find the final product.

• 6

• 36

• 180

• 200

• 280

Partial Products

17.) 19 x 24

Ans.

4 x 9 = 36

4 x 10 = 40

20 x 9 =180

20 x 10 =200