Mental Math
560 ÷ 80
What is 7?
Estimate 804 ÷ 12 using compatible numbers (rounding). State what each compatible number is as well.
What is 800 ÷ 10 = 80?
Use partial quotients to divide 736 ÷ 23. State the partial quotients and the whole quotient. Check with multiplication!
Partial quotients: 30 and 2
Whole quotient: 32
Solve 544 ÷ 27 using long division.
What is 32?
Nehal has created 81 funny memes. She made a goal to create 3 funny memes each day, and she accomplished her goal! How many days did it take Nehal to make 81 memes?
81 / 3 = 27
6,300 ÷ 90
What is 70?
Estimate 434 ÷ 37 using compatible numbers (rounding). State what each compatible number is as well.
What is 400 ÷ 40 = 10?
Use partial quotients to divide 688 ÷ 43. State the partial quotients and whole quotient. Check with multiplication!
Partial quotients: 10 and 6
Whole quotient: 16
Solve 867 ÷ 68 using long division.
What is 12 R 51?
Ismriti has 3 cousins in her ACO. Jana has 6. Together, they have been peeved 108 times by their cousins since March. If each cousin annoyed them an equal number of times, how many times did each cousin commit an annoying offense?
3+6 = 9 cousins
108 / 9 = 12
Each cousin committed 12 annoying offenses.
1,600 ÷ 80
What is 20?
Estimate 792 ÷ 35 using compatible numbers (rounding). State what each compatible number is as well.
What is 800 ÷ 40 = 20?
Use partial quotients to divide 362 ÷ 7. State the partial quotients and whole quotient. Check with multiplication!
Partial quotients: 20 and 7, remainder 11
Whole quotient: 27 R 11
Solve 332 ÷ 29 using long division.
What is 11 R 13?
Mr. G had 483 Class Dojo points to give out before his last day. He wanted to distribute them equally between his 21 students. How many points could each student receive?
483 / 21 = 23
48,000 ÷ 80
What is 600?
Estimate 1,036 ÷ 21 using compatible numbers (rounding). State what each compatible number is as well.
What is 1,000 ÷ 20 = 50?
Use partial quotients to divide 840 ÷ 28. State the partial quotients and whole quotient. Check with multiplication!
Partial quotients: 30
Whole quotient: 30
Solve 8,899 ÷ 61 using long division.
What is 145 R 54?
A parking garage has 6 levels. Each level has 15 rows. There are 2,250 parking spaces in all. How many parking spaces are in each row? Write and solve equations to find the answer.
2,250 total spaces ÷ 6 levels = 375 spaces per level
375 spaces per row ÷ 15 rows = 25 spaces per row
or
15 rows x 6 levels = 90 rows total
2250 total spaces ÷ 90 rows = 25 spaces per row
A carton of staples has 60 packages. The carton contains 36,000 staples in all. Find the number of staples in each package.
What is 600 staples?
Josh's band wants to learn a new song for the school concert in 6 weeks, 42 days. The song has 2,024 lines. Find about how many lines they need to learn each day to learn the song in time.
What is 2,000 ÷ 40 = 50?
Use partial quotients to divide 755 ÷ 11. State the partial quotients and whole quotient. Check with multiplication!
Partial quotients: 60 and 8, remainder 7
Whole quotient: 68 R 7
Solve 1,699 ÷ 17 using long division.
What is 99 R 16?
A tropical storm has been moving at 15 miles per hour for the past two days. Bess recorded that the storm moved 135 miles yesterday and 75 miles today. For how many hours has Bess been keeping track of the storm? Write and solve equations.
135 + 75 = 210 miles
210 ÷ 15 = 14 hours