Lesson 86 Multiplying Round Numbers Mentally

Multiply mentally: 70 × 80

• 5,600

• 4,800

• 6,000

• 5,000

Multiply mentally: 40 × 50

• 2,050

• 1,500

• 2,000

• 1,800

Multiply mentally: 40 × $6.00

• $220.00

• $200.00

• $180.00

• $240.00

Multiply mentally: 30 × 800

• 24,000

• 22,000

• 26,000

• 28,000

It takes Jennifer 20 minutes to walk to school. At what time should she start for school if she wants to arrive at 8:10 a.m.?

• 7:50 p.m

• 7:40 a.m.

• 7:50 a.m.

• 7:45 a.m.

Before her haircut Rapunzel weighed 125 pounds. After her haircut she weighed 118 pounds. What was the weight of the hair that was cut?

• 9 pounds

• 5 pounds

• 8 pounds

• 7 pounds

Lucy bought a hamburger for $2.89, fries for $0.89, and a drink for 79¢. The tax was 28¢. She paid with a $5 bill. How much money should Lucy get back?

• 25¢

• 15¢

• 10¢

• 20¢

According to this calendar, October 30, 1904, was what day of the week?

• Sunday

• Monday

• Tuesday

• Wednesday

Round three thousand, seven hundred eighty-two to the nearest thousand.

• 3,000

• 4,000

• 3,800

• 3,700

How many pounds is 2 tons if one ton is equal to 2000 lbs.?

• 1,000 pounds

• 2,000 pounds

• 3,000 pounds

• 4,000 pounds