Adding/Subtracting Large Numbers
352 + 15 =
367
20 x 6 =
120
12 x 10 =
120
2 x 6 =
12
Round to the hundreds place: 764
800
9,972 - 451 =
9,521
24 x 3 =
72
65 x 10 =
650
7 x 4 =
28
Round to the ten thousands place: 543,264
540,000
6,529 + 1,782 =
8,311
39 x 4 =
156
32 x 12 =
384
9 x 7 =
63
Nicole has 28 butterfly stickers and 13 moth stickers. About how many stickers does she have? (Estimate!)
Estimation Equation: 30 butterfly stickers + 10 moth stickers.
Answer: Nicole has about 40 stickers.
Walter has $12,164 in his bank account. $1,985 is sent to the landlord to pay for his apartment's rent. How much money does Walter have left after the payment?
$10,179
There are 5 department stores that need 511 lightbulbs replaced in each building. How many replacement lightbulbs need to be ordered for all the department stores?
2,555
76 x 25 =
1,900
8 students want to carve 6 pumpkins each to decorate their home. How many pumpkins are needed all together?
48
Mark harvests 964 apples each week. After 5 weeks, around how many apples has he harvested? (Estimate!)
Answer: Mark harvests around 5,000 apples after 5 weeks.
Susan saves up $15,974 in her bank account. She buys a car worth $13,987. How much money does Susan have left after the car is bought?
$1,987
Carl has 9 large boxes of chocolate bars. Each box has 423 bars. How many chocolate bars does Carl have in total?
3,807 chocolate bars
The Astro telescope identifies 98 galaxies in the night sky. It observes each galaxy has 53 planets. How many planets are there in total?
5,194 planets
Jenny is buying one day's worth of mealworms for her 7 leopard geckos. Each leopard gecko needs to be fed 8 mealworms. How many mealworms does Jenny need to buy for one day?
56 mealworms
Candace spends $421 on groceries every month. After 6 months, about how much will she have spent on groceries? (Estimate!)
Estimation Equation: $400 x 6 months
Answer: Candace will have spent about $2,400 on groceries after 6 months.