Estimating Decimal Calculations
I can estimate the result of decimals that are added, subtracted, multiplied, or divided.
Adding and Subtracting Decimals
I can add and subtract multi-digit decimals.
Multiplying Decimals
I can multiply multi-digit decimals.
Fraction and Decimal Relationships - Part II
I can write decimals as fractions with denominators of 10, 100, or 1000.
(Note: When dividing decimals, you can rewrite them as fractions and then divide the fractions to find the quotient. Simplifying the fractions is not always helpful.)
Dividing Decimals
I can divide a decimal by a whole number.
I can calculate sales tax, tips, and discounts.
I can estimate the result of decimals that are added, subtracted, multiplied, or divided.
- Video tutorial #1 (sum): https://www.youtube.com/watch?v=BkwI6Uu0vi4
- Video tutorial #2 (difference): https://www.youtube.com/watch?v=zpsi8EqLB9g
- Video tutorial #3 (product): https://www.youtube.com/watch?v=S-z0OMrXWeM
- Video tutorial #4 (0:00 - 5:27) (quotient): https://www.youtube.com/watch?v=EDSt6absnU0
- Estimating with adding decimals practice: https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-arith-operations/adding-decimals-intro/e/estimating-with-adding-decimals
- Estimating with subtracting decimals practice: https://www.khanacademy.org/math/cc-fifth-grade-math/cc-5th-arith-operations/subtracting-decimals-intro/e/estimating-with-subtracting-decimals
- Estimating with multiplying decimals practice: https://www.khanacademy.org/math/cc-fifth-grade-math/multiplication-and-division/cc-5th-mult-decimals/e/estimating-with-multiplying-decimals
- Estimating with dividing decimals practice: https://www.khanacademy.org/math/cc-fifth-grade-math/multiplication-and-division/cc-5th-dividing-decimals/e/estimating-with-dividing-decimals
Adding and Subtracting Decimals
I can add and subtract multi-digit decimals.
- Video tutorial #1: https://www.youtube.com/watch?v=gD-h0HGurg8
- It's always a smart idea to use estimation to double check your answers!
- Video tutorial #2: https://www.youtube.com/watch?v=0heWxHeRbkY
- Adding decimals games:
- Subtracting decimals games:
- Hotel Decimalfornia game (adding and subtracting): http://mrnussbaum.com/hotel/
- Word problems practice:
Multiplying Decimals
I can multiply multi-digit decimals.
- Video tutorial #1: https://www.youtube.com/watch?v=rnVS42tDXt0
- Video tutorial #2: https://www.youtube.com/watch?v=eI6Xp6pwhqc
- Multiplying decimals practice:
- Cloning Penelope game: https://www.education.com/game/beaker-transport/
- Hoop shoot game: http://www.math-play.com/multiplying-decimals-game.html
- Power football game (choose multiplication and preferred level): https://www.funbrain.com/games/power-football
- Spy game: http://www.learnalberta.ca/content/mesg/html/math6web/index.html?page=lessons&lesson=m6lessonshell05.swf
- When solving the problems, choose operations carefully. You will not always be multiplying the two numbers together.
- Word problem practice: https://www.mathgames.com/skill/5.55-multiply-decimals-and-whole-numbers
Fraction and Decimal Relationships - Part II
I can write decimals as fractions with denominators of 10, 100, or 1000.
(Note: When dividing decimals, you can rewrite them as fractions and then divide the fractions to find the quotient. Simplifying the fractions is not always helpful.)
- Video tutorial #1: https://www.youtube.com/watch?v=cOC-u-5uy7I
- Video tutorial #2: https://www.youtube.com/watch?v=adA4N2zu4rI
- Decimals as fractions practice:
Dividing Decimals
I can divide a decimal by a whole number.
- Video tutorial #1 (using fractions): https://www.youtube.com/watch?v=Ptdq48DjGW8
- Video tutorial #2 (standard algorithm): https://www.youtube.com/watch?v=XvzmTot_QCE
- Video tutorial #3 (standard algorithm): https://www.youtube.com/watch?v=FIUx4TGgOFU
- Dividing decimals by whole numbers practice:
- http://www.coolmath.com/prealgebra/02-decimals/decimals-cruncher/division
- Choose the medium level for problems where the divisor is a whole number.
- http://www.aaamath.com/dec56ax2.htm
- http://www.coolmath.com/prealgebra/02-decimals/decimals-cruncher/division
- Word problems practice: https://www.mathgames.com/skill/6.45-divide-decimals-by-whole-numbers
- Video tutorial #1: https://www.youtube.com/watch?v=RdIbi6NX9pY
- Video tutorial #2: https://www.youtube.com/watch?v=l3IZIWyeMOE
- Video tutorial #3: https://www.youtube.com/watch?v=7JPIX3odZrY
- Dividing decimals practice:
- http://www.coolmath.com/prealgebra/02-decimals/decimals-cruncher/division
- Choose the hard level for problems where the divisor and dividend are decimals.
- http://www.aaamath.com/dec56b-divdeci.html
- http://www.coolmath.com/prealgebra/02-decimals/decimals-cruncher/division
- Power football game (choose division and your preferred level): http://www.funbrain.com/football/
- Jeopardy game: https://jeopardylabs.com/play/dividing-decimals
I can calculate sales tax, tips, and discounts.
- Video tutorial #1 (sales tax): https://www.youtube.com/watch?v=wbjcuQB0onA
- Video tutorial #2 (sales tax and tips): https://www.youtube.com/watch?v=XB-IYTmb-uk
- Video tutorial #3 (discounts): https://www.youtube.com/watch?v=1pdnLsx6tkQ
- Sales tax practice: http://www.aaamath.com/pct68_x5.htm
- Sales tax, tip, discount practice: https://www.mathgames.com/skill/7.63-percent-of-a-number-tax-discount-tip
- Sales tax game: http://www.math-play.com/Sales-Tax/Interactive-Sale-Tax-Game.html
- Restaurant tipster game: http://mrnussbaum.com/tipster/
- Penguin waiter game: https://www.funbrain.com/games/penguin-waiter
- Math at the mall game: http://www.mathplayground.com/mathatthemall2.html
- Sales tax, tip, discount, "% of" Jeopardy game: https://jeopardylabs.com/play/tax-tip-discount