Rounding
Round 325 to the nearest ten
330
137
100
Estimate the sum by rounding to the nearest hundred: 452 + 312
500 + 300 = About 800
Estimate the difference by rounding to the nearest ten:
57 - 42
60 - 40 = About 20
736-242
494
Round 385 to the nearest hundred
400
55,492
55,500
Estimate the sum by rounding to the nearest hundred:
425 + 268
400 + 300 = About 700
Estimate the difference by rounding to the nearest ten:
657 - 442
660 - 440 = About 220
367+543
910
Round 4,492 to the nearest hundred
4,500
835,837
835,840
Estimate the sum by rounding to the nearest thousand:
6,799 + 2,150
7,000 + 2,000 = About 9,000
Estimate the difference by rounding to the nearest thousand:
4,572 - 3,299
5,000 - 3,000 = About 2,000
There are 98 colored pencils in a bag. Five students each take 7 pencils from the bag. The number of pencils left in the bag is p
Which equation represents the situation?
p=98−5×7
Round 5,294 to the nearest hundred
5,300
1,977
2,000
Estimate the sum by rounding to the nearest ten:
786 + 242
790+240= 1,030
Estimate the difference by rounding to the nearest hundred:
4,572 - 3,299
4,600 - 3,300 = About 1,300
There are 600 seats in the auditorium. There are 187 from Noah's school and 229 from Samire's school.
Noah says there will be about 200 empty seats. Is Noah's estimate reasonable Why or why not?
Yes, because 229 rounds to 230. 187 rounds to 190 when rounded to the nearest tens place.
230+190= 420
600-420= 180
180 rounds to 200 when rounded to the nearest hundreds place.
Round 2,550 to the nearest hundred
2,600
7,432
7,400
Estimate the sum by rounding to the nearest hundred:
468 + 393
500+400=900
Estimate the difference by rounding to the nearest ten:
4,572 - 3,299
4,570 - 3,300 = About 1,270
Praise had 136 pokemon cards. He bought 4 new packs of cards. After buy the new packs he had 160 cards.
Write an equation to solve and figure out
How many cards were in each pack.
136 + (4 X P)= 160
P=6