Back to: Mathematics Primary 5
HELLO, WELCOME TO A NEW CLASS
Mathematics involves solving problems that involve numbers. We will work with whole numbers, which are any of the numbers 0, 1, 2, 3, and so on. A digit is one of the symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9. All numbers are made up of one or more digits. Numbers such as 2 have one digit, whereas numbers such as 89 have two digits. To understand what a number really means, you need to understand what the digits represent in a given number.
OR WE SAY
2 = 2000 —- Thousand (1000)
3 = 300 — Hundred (100)
4 = 40 — Tens (10)
5 5 —- units
2,34
WRITE IN WORD
- 3,469 =Three thousand, four hundred and sixty nine
- 4, 196 = four thousand, one hundred and ninety six
- 26, 717 = twenty six thousand, seven hundred and seventeen
- 214,616=two hundred and fourteen thousand, six hundred and sixteen
WRITE IN FIGURE
Interval of 2
32 34 36 38 40
42 44 46 48 50
52 54 56 58 60
Interval of 5
65 70 75 80 85
90 95 100 105 110
115 120 125 130 135 140
Interval of 10
150 160 170 180 190 200
210 220 230 240 250 260
Interval of 20
280 300 320 340 360 380 400 420 440 460 480 500
Interval of 50
550 600 650 700 750 800 850 900 950 1000
WRITING UP TO MILLIONS
Standard form is the usual way to write a number using digits.
Word form is the way you read or say a number.
Expanded form shows the value of each digit.
EXAMPLE 3:
Write 268,731 in word form and expanded form.
Solution
Word form: Two hundred and Sixty-eight thousand, seven hundred and thirty-one
Expanded form: 200,000 + 60,000 + 8,000 + 700 + 30 + 1
EXAMPLE 4:
Write twenty-two million, eight hundred and five thousand, fifty-five in standard and expanded form.
Step1: Write it down in period by period
Twenty-two million =22,000,000
Eight hundred five thousand = 805,000
Fifty-five = 55
Step2: Add up
22,000,000
805,000
+ 55
22,805,055
Standard form: 22,805,055
Expanded form: 20,000,000 + 2,000,000 + 800,000 + 5,000 + 50 + 5
Quiz
Write these numbers in words:
- 4567
- 34289
- 457329
- 1657389
- 3246781
Write these amounts in digits:
- Two thousand and thirty four
- Twelve thousand, two hundred and eight
- One hundred and twelve thousand, six hundred and forty five.
- Seven million thirty four thousand and seven
- six million, seven hundred and twenty two thousand, four hundred and three.
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