Place Value & Rounding
What is the value of 5? 5,206,796
5 million
Estimate 79 × 73
≈ 80 × 70 = about 5600
Estimate 17+27
20 + 30 = about 50
Convert to mixed number if applicable. 1/2 divided by 1/6
= 6/2 = 3
How many half-hour periods are there in four hours?
8 periods
What is the value of the 9? 6,946,242
9 hundred thousand
Estimate 365 × 24
So 365 ≈ 400, and 24 ≈ 20. 400 × 20 = about 8000.
Estimate 58+22
60 + 20 = about 80
Convert to mixed number if applicable. 2/3 divided by 1/4
8/3 = 2 2/3
Peter poured 2 liters of milk equally into five glasses. How much milk was there in each glass?
⅖ = 0.4L
Round to the nearest thousands place: 4,649,876
4,650,000
Estimate 249 × 34
250 × 30. 3 × 25 = 25 + 25 + 25 = 75. 75 x 100 = about 7500.
Estimate 290+510
300 + 500 = about 800
Convert to mixed number if applicable. 3 1/3 divided by 8
5/12
How many bricks weighing ¼ pound each will have a total weight of 3 lbs?
12 bricks
Round to the nearest tenths place: 4,468,749.957
4,468,750.000
Estimate 178 × 28
180 × 30 (rounding both numbers to nearest ten). 100 × 30 + 80 × 30, which is 3000 + 2400 = about 5400.
Estimate 67 + 79+ 22
70 + 80 + 20 = about 170.
Convert to mixed number if applicable. 3 1/2 divided by 2/5
=35/4 = 8 3/4
A red ribbon 11 m long is 5 times as long as a blue ribbon. How long is the blue ribbon?
1.83 m long (3 repeating)
Round to the thousandths place: 5,999,999.999
5,999,999.999(0) so stays the same
Estimate 144 × 24
(Round one down and one up) 100 x 30 = about 3000
Estimate 387+293
400 + 300 = about 700
Convert to mixed number if applicable. 3 1/3 divided by 1/4
40/3 = 13 1/3
Kimberly cuts 6 pieces of tape, each 4/5 m long, from a roll of tape 5 m long. How many meters of tape are left in the roll?
1/5 m