Solving Multi-Step Math Problems Flashcards

A store sells notebooks for $3.75 each and pens for $1.25 each. Maria buys 4 notebooks and 6 pens. If she pays with a $25 bill, how much change does she receive?

Answer: $2.50

4 × $3.75 = $15.00 and 6 × $1.25 = $7.50, so total = $22.50 and change = $25.00 − $22.50 = $2.50.

A recipe calls for 2¼ cups of flour per batch. If Tyler wants to make 3 batches but already has 2 cups of flour, how many more cups does he need?

Answer: 4¾ cups

Total needed = 3 × 2¼ = 6¾ cups; subtract the 2 cups on hand gives 6¾ − 2 = 4¾ cups.

A pool holds 12,000 gallons. It is currently 35% full. A pump adds 150 gallons per hour. How many hours will it take to fill the pool to 80% capacity?

Answer: 36 hours

80% of 12,000 = 9,600 gal; 35% = 4,200 gal already in pool; need 5,400 more gal ÷ 150 gal/hr = 36 hours.

Sarah earns $12 per hour and works 8 hours on weekdays and 10 hours on weekends. In one week (5 weekdays, 2 weekend days), how much does she earn in total?

Answer: $720

Weekday earnings = 5 × 8 × $12 = $480; weekend earnings = 2 × 10 × $12 = $240; total = $720.

A car travels 240 miles on 8 gallons of gas. At this rate, how far can it travel on 5 gallons?

Answer: 150 miles

The car gets 240 ÷ 8 = 30 mpg, so on 5 gallons it travels 5 × 30 = 150 miles.

A rectangular garden is 15 feet long and 9 feet wide. If a bag of fertilizer covers 27 square feet, how many bags are needed to cover the entire garden?

Answer: 5 bags

Garden area = 15 × 9 = 135 sq ft; bags needed = 135 ÷ 27 = 5 bags.

A school ordered 14 boxes of crayons with 24 crayons each. After distributing equal amounts to 9 classrooms, 12 crayons were left over. How many crayons did each classroom receive?

Answer: 36 crayons

Total crayons = 14 × 24 = 336; crayons distributed = 336 − 12 = 324; each classroom gets 324 ÷ 9 = 36 crayons.