Operations
Name the operation you need to use:
Jess had 42 books in her Library she receives 36 more for her birthday. How many books does she have in her library now
adding (+)
Round 147 to the nearest 10
150
estimate: 315 - 125 =
300-130 = 170
320 - 130 = 190
Estimate 28x5
30x5=150
Jen has 3578 books Jessica has 4314 book ABOUT how many books do they have altogether?
4000+4000 = 8,000
or
3600+4300 = 7,900
State the operation needed
There are 25 calories in a chocolate bar, how many calories are in 10 chocolate bars
Multiply (X)
round 1368 to the nearest 100
1400
Estimate: 6,537+5,367=
6,500+5,400 = 11,900
Estimate:554/60
600/60= 10
Jen is in ticket sales, there are 22 play. she hopes to sell about 40,000 tickets. About how many tickets does she need to sell to each play?
2,000 tickets to each play
State the operation needed
A school has 30 classrooms and 500 students, how many students are in each class room?
Division (/)
round 2194 to the nearest 1000
2000
Estimate: 2,374+25,725=
2,000+26,000= 28,000
Estimate 15,600/36=
15,000/30 = 500
There are 453 students in a school. About how many students in total of 10 schools of similar size
450x10= 4,500
There are 24 soccer games in the season, the season lasts 2 months, how many games are in each month?
division (/)
Round 524,674 to the nearest 1000
525,000
Estimate: 125-58
120-50=70
estimate 760x36 =
800x40 = 32,000
Larry went to the hardware store to buy 500 nails. There are 100 nails in each pack. Each pack sells for 5.78. About how much does he send on nails?
5x6= $35.00
Sally has 166 golf balls, Jen has 452 golf balls. how many more golf balls does Jen have than sally?
subtraction (-)
Round 26,494 to the nearest 10, 100 and 1000
26,490
26,500
26,000
Estimate: 9,874-2,987=
10,000-3000= 7,000
Estimate: 45,600/50
50,000/50 = 1,000
a school has 438 students estimate the total for 3 schools about the same size
440x3=1320