Lab 5Lab 5 ACMNA105 Fractions and decimals • Compare, order and represent decimals. Order ... 1 First estimate answers in whole numbers. Word problems...
Y4 Addition and Subtraction. 4260 . Use known number facts and place value . to add or subtract. Equipment: Paper, pencil, ruler . Number cards . Stop clock
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Skills I Topics: Exercise Book Addition crossword and word search activity Missing addends activity sheet Addition color by number activity Subtraction within 100
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Tons of Free Math Worksheets at: ... Decimal Multiplication - Matching Worksheet Author: http://www.mathworksheetsland.com/topics/decimals/multiplicationset.html
Decimal Multiplication Rewrite each problem vertically and solve. a. 3.7 x 0.4 = 1.48 b. 18.7 x 6 = 112.2 c. 81.9 x 0.5 = 40.95 d. 9.9 x 0.8 = 7.92 e
iv General instruction to Students Students are informed to present 5 min before the commencement of lab. Students must enter their name in daily book before
N – 0.006590383 moles (3 significant figures). M = m n. = 0.33 grams. 0.006590383 moles. = 50.0729 g mole. = 50. grams/mole or 5.0 10 grams/ mole. 8. Determine the percent error. Molar Mass of Butane C4H10 = 58.123 g/ mole. Percent Error = accepted −
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Conclusion: The experiment is conducted as per the procedure laid down. The specific gravity of soil solids obtained is ______. This value falls in the range 2.6 to 2.75. Hence the type of soil is ______. Post - Viva Questions: 1. What are the standa
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Lab 5
fraction ally 2
Decimal Decimal addition addition and and subtraction subtraction
4.17
Order decimals
3.35
4.83
2.90 5.06
0.98 These aliens are from ONKUTO where everyone is a different height. Dronk is 4.17 m, Sonk is 2.90 m, Monk is 4.83 m, Wonk is 3.35 m, Tronk is 5.06 m, Gonk is 0.98 m. 1 Order them from tallest to shortest. ____________________________________________________________________________________________________________ 2 What measurement is the decimal part of their height? _________________ 3 What is the difference in height between? a Dronk and Wonk?
4 . 1 7 - 3 . 3 5 m
b Tronk and Gonk?
c Monk and Sonk?
d Tronk and Monk?
4 What is the total height of: a Monk, Dronk and Sonk?
76
b Gonk, Wonk and Tronk?
c all of them?
ACMNA105 Fractions and decimals • Compare, order and represent decimals.
+, – decimals
Decimals Decimals
Word • to keep decimal points problems under each other. • to put a decimal point in the answer. Est. 7 . 3 4 7+2=9 + 1 . 6 9 9 . 0 3
1 First estimate answers in whole numbers. a 7.6
3.8 + 1.4
Est.
b 9.4
+
4.8 0.6
Est.
c 11.2
0.8 + 24.5
Hint Put the decimal point in the answer first so you don’t forget.
Est.
d 3.85
e 5.63
f 7.09
g 8.11
2.50 + 5.69
8.42 + 3.65
Est.
Est.
Est.
Est.
Est.
2.07 + 1.92
2 a 3.9
8.71 + 4.58
0.38 + 9.17
h 1.74
b 8.6
c 9.7
Est.
Est.
f 4.93
– 1.61
g 7.75
– 3.44
h
8.07 – 2.36
i 6.52
– 3.78
j 9.40
Est.
Est.
Est.
Est.
Est.
– 1.7
– 5.1
– 5.2
d 6.1
– 2.6
e 5.4
Est.
Est.
Est.
3
$2.85
$5.72
– 3.5
– 5.76
$9.56
$4.91
How much did they spend? a Toby bought thongs, ball and snorkel set. ____________
$6.18 Working
b Jill bought hat, sunscreen and ball. ____________ c Bob bought snorkel set, sunscreen and thongs. ____________ d Tracy bought hat, snorkel set and ball. ____________ How much change? e Bill had $7.40 and bought sunscreen. ____________ f Jason had $9.05 and bought thongs. ____________ g Jan had $5 and bought a ball. ____________ ACMNA106 Money and financial mathematics • Create simple financial plans.
77
Multiplication Multiplication of of decimals decimals 1 On page 76 the heights are in metres. a Why are there two numerals after the decimal point?
Tens Ones
7
2
3-digit algorithms
Tenths Hundredths
.
3
9
3 9 ____________________________________________________________________________________________________________ 70 + 2 + 10 + 100 b Write their height in centimetres.
