Topic 1 - 4

DECIMAL OPERATIONS

100

What is 4.5 + 3.2?

WHAT IS 7.7 OR 7.70

200

What is 9.6 - 2.8?

WHAT IS 6.8 OR 6.80

300

What is 3.4 × 0.5?

WHAT IS 1.7 OR 1.70

400

What is 7.2 × 0.6?

WHAT IS 4.32

500

What is 5.48 + 6.39?

WHAT IS 11.87

MULTIPLICATION

100

What is 23 × 4?

92

200

What is 45 × 6?

270

300

What is 78 × 3?

234

400

What is 125 × 8?

1000

500

What is 246 × 5?

1230

ESTIMATION

100

Estimate: 198 + 302

WHAT IS 200 + 300 = 500

200

Estimate: 49 × 19

WHAT IS 50 X 20 = 1,000

300

Estimate: 612 - 289

WHAT IS 600 - 300 = 300

400

Estimate: 74 × 51

WHAT IS 70 X 50 = 3,500

500

Estimate: 399 + 598

WHAT IS 400 +600= 1,000

PLACE VALUE

100

Value of 5 in 2.5?

FIVE TENTHS

200

Value of 4 in 7.34?

FOUR HUNDREDTHS 

300

Value of 6 in 6.248?

SIX ONES

400

Value of 8 in 4.082?

EIGHT HUNDREDTHS

500

Value of 9 in 0.009?

NINE THOUSANDTHS

WORD PROBLEMS

100

A ribbon is 2.5 inches long. Buy 4. Total length?

10 INCHES

200

3 boxes have 24 pencils each. Total pencils?

72

300

Each book costs $6. 7 books cost?

$42

400

A student walks 0.8 miles for 5 days. Total?

4 MILES

500

12 crates hold 135 apples each. Total apples?

1620