Rounding
Round 104,276 to the nearest hundred thousand.
100,000
A rectangle has a length of 8 cm and a width of 5 cm. What is the area?
Area = length × width = 8 × 5 = 40 cm²
Sarah has 15 apples. Her brother has 4 times as many. How many do they have together?
75 apples
Mia has 24,315 stickers. She buys 13,482 more stickers. How many stickers does she have now?
37,797 stickers
45,312 ___ 40,000 + 5,000 + 300 + 12
45,312 = 45,312
Round 8,642 to the nearest thousand.
9,000
A rectangle has a length of 12 m and a width of 7 m. What is the perimeter?
Perimeter = 2 × (length + width) = 2 × (12 + 7) = 38 m
A bookstore has 15 novels and 60 comics.
How many more comics than novels are there?
How many times as many comics as novels are there?
Additive: 60 − 15 = 45 more comics
Multiplicative: 60 ÷ 15 = 4 times as many comics
A factory made 75,206 toy cars. They sold 48,419 toy cars. How many toy cars are left?
26,787 toy cars
Seventy-two thousand, four hundred eighteen ___ 70,000+2,000+100+40+8
72,418 > 72,148
A store sold 102,476 pencils this month. About how many pencils did they sell if you round to the nearest hundred?
102,500 pencils
A garden is 10 m long and 6 m wide. The gardener wants to put a fence around it. How many meters of fencing are needed?
Perimeter = 2 × (10 + 6) = 32 m
A ribbon is 5 times as long as a string. The ribbon is 135 inches. How long is the string?
27 inches
A zoo has 128,407 visitors in January and 56,209 visitors in February. How many visitors did the zoo have in both months combined?
184,616 visitors
63,502 ___ 60 hundreds 503 ones
63,502 > 6,503
A city has a population of 68,342 people. Estimate the population to the nearest ten thousand.
70,000 people
Question: Find the area of this L-shaped figure (rectilinear figure):
Top rectangle: 6 m × 4 m
Bottom rectangle: 3 m × 4 m
Top area = 6 × 4 = 24 m²; Bottom area = 3 × 4 = 12 m²;
Total area = 24 + 12 = 36 m²
A toy company packed 448 toy cars into boxes. Each box has the same number of cars. If there are 8 boxes, how many cars are in each box?
56
A city library has 402,308 books. They give 187,564 books to schools. How many books remain in the library?
214,744 books
Liberty High school has 58,306 students. West Brunswick High School has 50,000 + 8,000+30 +9 students. Which school has more students?
West Brunswick
A farmer harvested 3,482 apples from one orchard and 4,719 apples from another orchard. About how many apples did he harvest in total if you round each orchard’s harvest to the nearest hundred first?
First orchard: 3,482 → 3,500
Second orchard: 4,719 → 4,700
Total estimate: 3,500 + 4,700 = 8,200 apples
A rectangle has an area of 36 m². Which of the following could be its perimeter?
A) 26 m
B) 38 m
C) 30 m
3×12 → Perimeter = 2(3+12) = 30 m
4×9 → Perimeter = 2(4+9) = 26 m
A baker made 6 trays of cookies. Each tray has the same number of cookies. Altogether he made 48 cookies.
a) Write an equation to find the number of cookies per tray using a symbol for the unknown.
b) Solve it.
A farmer has 63,492 apples. He picks 218,607 more apples but sells 124,305 apples at the market. How many apples does he have left?
157,794 apples
A city library has Sixty-seven thousand, nine hundred fifteen books. A school library has 6 ten thousands, 79 tens, 20 ones books. Which has more books?
The city library has more books.