ppt ceramah math
TRANSCRIPT
WHOLE NUMBERWrite in words : 254 two hundred and fifty-four 132 one hundred and thirty-two 254 132 Thou => two hundred fifty-four thousand one hundred and thirty-two.
Write in numerals Nine hundred fifty-seven thousand and six 9 5 7 0 0 6
thou
=>
957 006
Place value and digit value. Place value chart.Hundredthousands
Tenthousands
thousands
hundreds
tens
ones
3
2
4
5
7
8
3 2 4 5 7 8 Place value Digit value 3 2 4 5 7 8 4 0 0 0 thousands 4000
Rounding off numbers1. 2. 3. 4. Underline the digit involved Replace the other digits on its right with zero. Retain all the digits on its left. Look at the first to the right of the place value involved. If the digit is less than 5 (0,1,2,3,4) retain the digit. If the digit is 5 or more (5,6,7,8,9) add 1 to the digit.
Rounding off numbers. - Use place value chart.Hundred thousand s Ten thousand s thousand s hundreds tens ones
9
6
4
0+1
9
Nearest tens
9
6
4
1
0
Nearest hundred
Hundred thousand s
Ten thousand s
thousand s
hundreds
tens
ones
9 9
6 6
4 4
1 0
0 0
H thou
Ten thou 9
Thou 6
H4
tens 1
ones 0
9
6
0
0
0
Nearest thousand
Basic operation addition7+
6 7 4
8 1 0
5 8 3
7 7
2 3
3 1
: 7685 + 723718 1. Write in vertical form. 2. Same place value. 3. Do the calculation use number line 1-18.
76120 9282 = 668386 15 10 11 10
7-
6 9 6
1 2 8
2 8 3
0 2 8
subtraction
6
1
2
3
4
5
6
7
8
9
10
11 12 13 14 15 16 17 18
Multiplication Using lattice style 45 123 x 7 = 315 861 4 3 5 1 2 3 2 1 1 7 1 2 3 4 5 6 7 8 9 7 14 21 28 35 42 49 56 63
2+1 3 0 1 8 5 7 4 1 5 8 6
645 X 17 = 10 9656 0 4 0 0 5
14 0
62 2
48
+1
1
55 7
3
9
6
5
Multiplied by 10, 100, 1000
1324 101324 10 132401324 X 100
1324 1000 1324 1000 1324000
1324 X 100 132400
Division1 2 3 4 5 6 7 8 9 4 8 12 16 20 24 28 32 36
1048 4 = 2622624
1 048 824 24 8 8 0
Divided by ten 6 277 10 = 6 277 10 627 remainder 7 627 7
Divided by 100 6 277 10 0 =
6277 100
62 remainder 77 62.77
Divided by 1000 6 277 10 00 =
6 277 1 000
6 remainder 277 6.277
DECIMAL - Place value and digit value - use place value chart 30 26Tens ones d. p tenths hundredths
3
0
2 tenths 0.2
6
Digit 2 Place value Digit value
Addition and subtraction 1. 23 + 5.382+ 2
35 8
.. .
03 3
08 8
Rounding off decimal numbers Nearest tenths ( 1 decimal place) 4 . 312 4.3 Nearest hundredths ( 2 decimal places) 4.312 4.31
FRACTIONS Equivalent fraction - multiplied denominator and numerator by the same number. 2 = 4 6 8 10 12 14 16 18 20 3 4 5 6 7 8 9 10
1 2
Simplest form - divided numerator and denominator by the same number
4 6
2 2
=
2 3
PERCENTAGE -Calculate 18 % of 25018 100
x
250 = 45
= 45010
averageFind the average 3 , 18 and 66 3 + 18 + 66 = 3 Total of quantity divided by number of quantity
CONVERSION OF UNITS Length Kmx1000 x 100 x 10
m
cm
mm
1000
100
10
Km
m
cm
mm
Mass Kg
x 1000
g
1000
Kg
g
Volume of Liquid x1000
l
l1000
ml
ml
1. 2 6 Kg + 725 g =
+
kg 2 0 3
. 67 3-
g 0 2 2
0 5 5
3.325 kg 3325 g 3 Kg 325g
-
1 km 7 8 1 6
3 5 7
12
1000 m 17 7 8 9
0 0 0
6.790 km 6790 m 6 km 790m
22 cm + 4 m1 = 100m 0 4 4 cm 2 2 0 0 2 2
+
4m
22 cm
4 . 22 m422 cm
PERIMETER8 cm 5 cm 4 cm 6 6 cm
Perimeter = 8 cm + 6 cm + 8 cm + 5 cm + 4 cm + 5 cm + 2 cm = 38 cm
AREA3 cm
5 cmArea = length x breadth = 3 cm x 5 cm2
= 15 cm
VOLUME3 cm volume = l x b x h = 3cm x 5cm x 3cm3
= 45 cm
5 cm3 cm