multiplication and division
Estimate by rounding to the nearest 100.
376 X 731
400 X 700 = 280,000
What is 4,567,273 rounded to the nearest
hundred thousand?
4,600,000
Add. then simplify.
3/12 + 2/12+ 1/12 + 4/12 =
10/12 = 5/6
10 X 10 X 490 =
49,000
What is the answer to a multiplication problem called?
Product
900 X 9 X 2
8,100 X 2 = 16,200
Bob bought 3 kg of hamburgers, 5 kg of hot dogs, and 2 kg of steak for a barbecue. How many grams of meat did he buy?
1 kg = 1,000 grams so he bought 10,000 grams.
Change to an improper fraction?
3 and 3/8
27/8
200 X 20 X 2 =
4,000 X 2 = 8,000
Howard arrived at work at 5:50 am. He stayed at work for 5 hours and 10 minutes. What time did he leave work?
11:00 am
6 X 5 X 25 X 2
1,500
What is 47,000 - 29,999 =
17,001
Change to a mixed number.
26/3
8 and 2/3
220 + 120 + 20 + 2 - 12 =
350
What are the first 4 multiples of 7?
7, 14, 21, 28
Estimate to the nearest 10.
24 X 58 =
20 X 60 = 1,200
What is the area of a rectangle that is 25 cm long and 15 cm wide?
375 sq. cm
What is 3/10 + 40/100 ?
70/100
15 X 15 =
(15 X 10 =150) + (5 X 15= 75) =
150 + 75 = 225
What form is this written in?
3,000 + 200 +5
Expanded form
58/5 =
11 R 3 or 11 and 3/5
Write this (say each number) in standard form: 1 million, 67 thousand, eighty-two
1,067,082
What is 5 and 4/8 + 4 and 5/8?
9 and 9/8 = 10 and 1/8
4 X 12 + 9 X 5 =
48 + 45 = 93
What are all the factors of 40?
(1, 2, 4, 5, 8, 10, 20, 40)