20/02/2014
1
UNIT 1
NUMBERS AND BASIC OPERATIONS
Section 1: Numbers
• 67 (sixty seven) is a number.
• It is a whole number or integer.
• A number consists of one or more digits.
• 3, 5, 67 are odd numbers
• 2, 12, 78 are even numbers.
Practice 1:
Read Out these numbers
1) 6 2) 13 3) 30 4) 49
5) 94 6) 99 7) 103 8) 168 9) 186 10) 200 11) 337 12) 422 13) 1,029 14) 2,315 15) 7,634 16)12,128 17) 18,614 18) 115,498
19) 800,902 20) 936,637
Section 2: Basic Operations
• When we add one quantity to
another we use symbol + (plus).
• The name of this operation is
addition
• The result of this operation is
called the sum.
Section 2: Basic Operations
• When we subtract one quantity from
another we use the symbol – (minus)
• The name of this operation is subtraction
• The result of this operation is called the
difference
Section 2: Basic Operations
• When we multiply one quantity by
another we use the symbol x (multiplied
by or times).
• The name of this operation is
multiplication.
• The result of this operation is called the
product.
Section 2: Basic Operations
• When we divide one quantity by another we
use symbol ÷ (divided by)
• The name of this operation is division.
• The result of this operation is called the
quotient.
20/02/2014
2
Practice 2:
1) 8 + 3 = 11
2) 9 + 18 = 27
3) 45 + 62 = 107
4) 79 – 65 = 14
5) 25 – 2 = 23
6) 16 – 4 = 12
7) 4 x 8 = 32
Practice 2:
8) 9 x 18 = 162
9) 14 x 27 = 378
10) 54 ÷ 9 = 6
11) 24 ÷ 3 = 7
12) 112 ÷ 8 = 14
13) 9 + 26 =
14) 10 + = 17
Practice 2:
15) 32 – 5 =
16) 116 – 14 =
17) 25 ÷
= 5
18) 36 ÷ 9 =
19) 30 x 5 =
20) 9 x = 81
Vocabulary Practice:
Using Single words, fill in the blank spaces in the following sentences:
1). The _____________ of three and four is twelve. 2). The operation which uses the symbol ÷ is called
___________
3). Forty-eight ___________ thirty-six equals twelve. 4). The result of a division problem is called
______________
5). A whole number is also known as an ___________________
Vocabulary Practice:
Using Single words, fill in the blank spaces in the following sentences:
6). Any number consists of combination of ________________
7). Eighteen subtracted __________twenty equals ___________
8). Three multiplied __________ five equals ____________
9). When we _________ two quantities, for example seven plus twelve, the answer (nineteen) is called _________
