Expanded Form/Standard Form
Write in Standard Form: 300 + 40 + 5
345
325 + 142
467
Round 347347347 to the nearest ten.
350
Estimate 47+36 by rounding to the nearest ten.
50 + 40 = 90
Sarah has 47 marbles. She buys 36 more. About how many marbles does she have now? Round to the nearest tens.
90 marbles
Write in Expanded Form: 582
500 + 80 + 2
734 - 215
519
Round 6,482 to the nearest hundred.
6,500
Estimate 284−137 by rounding to the nearest ten.
280 - 140 = 140
A bookstore has 284 books. It sells 137 books. About how many books are left? Round to the nearest ten.
140 books
Write in Standard Form: 2,000 + 700 + 30 + 6
2,736
1,248 + 3,572
4,820
Estimate the sum by rounding to the nearest ten: 238 + 464
240 + 460 = 700
Estimate 3,476+2,589 by rounding to the nearest hundred.
3,500 = 2,600 = 6,100
A factory produces 3,476 toys in January and 2,589 toys in February. About how many toys were produced in these two months? Round to the nearest hundred.
6,100 toys
Write in Expanded form: 6,504
6,000 + 500 + 4
8,035 - 4,689
3,346
Round 87,351 to the nearest thousand.
87,000
Estimate 8,742−4,369 by rounding to the nearest hundred.
8,700 - 4,400 = 4,300
A city had 8,742 residents last year and 4,369 residents moved away. About how many residents remain? Round to the nearest hundred.
4,300 residents
Write in Standard Form: 70,000 + 9,000 + 600 + 80 + 2
79,682
12,436 + 9,578 - 4,263
17,751
Estimate the difference by rounding to the nearest hundred: 5,872 - 3,459
5,900 - 3,500 = 2,400
Estimate 12,485 + 9,672 − 4,398 by rounding to the nearest thousand.
12,000 + 10,000 - 4,000 = 18,000
A company made 12,485 pens in January and 9,672 pens in February. It sold 4,398 pens in March. About how many pens does the company have now? Round to the nearest thousand.
18,000 pens