Unit 2 (5th Grade)

Unit Goals ,[object Object],[object Object],[object Object],[object Object],[object Object]

Write and solve open sentences for number stories ,[object Object],I had three fish and bought some more at the pet store. After two died, I had eight fish left. How many fish did I buy? f = fish bought 3 + f – 2 = 8 1 + f = 8 f = 7 Define your variable (the quantity you don’t know) Describe what took place using math operations Combine like terms Solve for the variable

Write and solve open sentences for number stories ,[object Object],Try one! per a out of ratio of quotient of percent ÷ Is Are Was Were will be gives yields sold for of times multiplied by product of increased/decreased by a factor of decreased by minus less difference between/of less than fewer than increased by more than combined together total of sum added to = X - +

Which open sentence describes the following number story? Lucas was comparing prices on a pair of mini-speakers. At one store, the pair of speakers cost $19.95. At a second store, the same speakers cost $24.70. At a third store, they cost $18.50. If he buys the speakers at the lowest price, how much will he save over the highest price? $24.70 + $19.95 = s S= savings $24.70 x $19.95 = s S= savings $24.70 - $19.95 = s S= savings $24.70 ÷ $19.95 = s S= savings

Correct! ,[object Object],Lucas was comparing prices on a pair of mini-speakers. At one store, the pair of speakers cost $19.95. At a second store, the same speakers cost $24.70. At a third store, they cost $18.50. If he buys the speakers at the lowest price, how much will he save over the highest price ? Click here to return to the goals page

Keep Trying! ,[object Object],Lucas was comparing prices on a pair of mini-speakers. At one store, the pair of speakers cost $19.95. At a second store, the same speakers cost $24.70. At a third store, they cost $18.50. If he buys the speakers at the lowest price, how much will he save over the highest price ? Click here to return to the goals page

Round numbers to designated places ,[object Object],[object Object],[object Object],[object Object],[object Object]

Round numbers to designated places ,[object Object],[object Object],[object Object],[object Object],[object Object],You are being asked to tell whether 1,342,365.1427 is closer to 1,342,000 or 1,343,000. 1,342,000.0000 Try one on your own!

Round numbers to designated places ,[object Object],200,000,000 235,000,000 234,000,000 230,000,000

Correct! ,[object Object],Click here to return to the goals page Round 234,567,890.0987 to the nearest million. Millions Is 234,567,890.0987 closer to 234 million or 235 million? 23 4 ,567,890.0987 235,000,000 5 or more, round up!

Keep Trying! ,[object Object],Click here to return to the goals page Round 234,567,890.0987 to the nearest million. Millions Is 234,567,890.0987 closer to 234 million or 235 million? 23 4 ,567,890.0987 235,000,000 5 or more, round up!

Make magnitude estimates ,[object Object],[object Object],[object Object],[object Object],[object Object],2. Find the product of the two rounded factors 40 x 40 = 1600 3. The answer should be in the 1000s 38 x 42 =1596 38 x 42 =

[object Object],Make magnitude estimates 300 x 40 = 12,000 The answer should be in the 10,000s 400 x 40 = 16,000 The answer should be in the 10,000s. 300 x 40 = 1,200 The answer should be in the 1,000s 400 x 40 = 1,600 The answer should be in the 1,000s

Correct! ,[object Object],Click here to return to the goals page 339 x 38 = 3 3 9 X 3 8 ________ 2 7 1 2 1 0 1 7 0 ________ 1 2, 8 8 2

Keep Trying! ,[object Object],Click here to return to the goals page 339 x 38 = 3 3 9 X 3 8 ________ 2 7 1 2 1 0 1 7 0 ________ 1 2, 8 8 2 Be sure to round to the nearest multiple of 10- the number’s highest place value! 339 is closest to 300 38 is closest to 40 300 x 40 = 12,000

Find the product of multi-digit whole numbers and decimals ,[object Object],. 5 3 4 . 0 x 2 . 3 0 2 2 5 1 Multiply 5340 x 3 0 0 8 6 0 1 Multiply 5340 x 20 0 2 0 2 2 1 Add the products Multiply by .01 Divide each number by .1

Find the product of multi-digit whole numbers and decimals ,[object Object],5 3 4 x 2 3 0 1 Multiply 20 x 500 0 0 6 Multiply 20 x 30 2 8 2 2 1 Add the products 0 0 0 0 8 5 1 0 0 9 0 1 2 Multiply 20 x 4 Multiply 3 x 500 Multiply 3 x 30 Multiply 3 x 4

The Lattice Method ,[object Object],[object Object]

Find the product of multi-digit whole numbers and decimals ,[object Object],[object Object],N = 15570 N = 125.7 N = 1557 N = 1257

Correct! ,[object Object],Click here to return to the goals page 43.25 x 36 = 4 3 . 2 5 X 3 6 . 0 0 ___________ 2 5 9 5 0 0 0 1 2 9 7 5 0 0 0 ___________ 1 5 5 7. 0 0 0 0

Keep Trying! ,[object Object],Click here to return to the goals page 43.25 x 36 = 4 3 . 2 5 X 3 6 . 0 0 ___________ 2 5 9 5 0 0 0 1 2 9 7 5 0 0 0 ___________ 1 5 5 7. 0 0 0 0

Unit 2 (5th Grade)

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Unit 2 (5th Grade)