Algebraic notation: multiplying

The Maths Habit

Work out the area of each rectangle.

1
53
15
2
42
8
3
310
30

Write “See you later” using as few characters as you can.

C U L8R, for example

n?
Variable
A letter that stands for a number.
Area
The space inside a flat shape.
See you laterC U L8R
Algebraic notation
The short way of writing algebra.

kkkkk4

Area = k + k + k + k

= 4 × k

= 4k

The number goes first. Leave out the × sign.

Is it written the short way? Yes or no.

17m
Yes
2m7
No: 7m
32 × t
No: 2t

Write the area using algebraic notation.

6t6t
1Multiply the sides
Area =t×6
2Number first, then a to z
=6×t
3Leave out the × sign
=6t

Write the area using algebraic notation.

p33p
1Multiply the sides
Area =3×p
2Number first, then a to z
=3×p
3Leave out the × sign
=3p

Write the area using algebraic notation.

6t6t
1Multiply the sides
Area =t×6
2Number first, then a to z
=6×t
3Leave out the × sign
=6t

Write the area using algebraic notation.

8v8v
1Multiply the sides
Area =v×8
2Number first, then a to z
=8×v
3Leave out the × sign
=8v
Remember1Multiply the sides2Number first, then a to z3Leave out the × sign

Write the area using algebraic notation.

6t6t
1Multiply the sides
Area =t×6
2Number first, then a to z
=6×t
3Leave out the × sign
=6t

Write the area using algebraic notation.

r22r
1Multiply the sides
Area =2×r
2Number first, then a to z
=2×r
3Leave out the × sign
=2r
Remember1Multiply the sides2Number first, then a to z3Leave out the × sign

Write the area using algebraic notation.

6t6t
1Multiply the sides
Area =t×6
2Number first, then a to z
=6×t
3Leave out the × sign
=6t

Write the area using algebraic notation.

9f9f
1Multiply the sides
Area =f×9
2Number first, then a to z
=9×f
3Leave out the × sign
=9f
Remember1Multiply the sides2Number first, then a to z3Leave out the × sign

Write the area using algebraic notation.

b55b
1Multiply the sides
Area =5×b
2Number first, then a to z
=5×b
3Leave out the × sign
=5b

Write the area using algebraic notation.

7d7d
1Multiply the sides
Area =d×7
2Number first, then a to z
=7×d
3Leave out the × sign
=7d

A box has h rows of 3 eggs. Write the number of eggs.

3h
1Multiply the sides
Eggs =h×3
2Number first, then a to z
=3×h
3Leave out the × sign
=3h
Remember1Multiply the sides2Number first, then a to z3Leave out the × sign

ba
ab

Area = a × b = ab

Area = b × a = ab

The same rectangle turned round. Write the letters a to z.

Which letter comes first, a to z?

1p  or  m
m
2y  or  w
w
3c  or  f
c

Write the area using algebraic notation.

mnmn
1Multiply the sides
Area =n×m
2Number first, then a to z
=m×n
3Leave out the × sign
=mn

Write the area using algebraic notation.

srrs
1Multiply the sides
Area =r×s
2Number first, then a to z
=r×s
3Leave out the × sign
=rs

Write the area using algebraic notation.

mnmn
1Multiply the sides
Area =n×m
2Number first, then a to z
=m×n
3Leave out the × sign
=mn

Write the area using algebraic notation.

pqpq
1Multiply the sides
Area =q×p
2Number first, then a to z
=p×q
3Leave out the × sign
=pq
Remember1Multiply the sides2Number first, then a to z3Leave out the × sign

Write the area using algebraic notation.

mnmn
1Multiply the sides
Area =n×m
2Number first, then a to z
=m×n
3Leave out the × sign
=mn

Write the area using algebraic notation.

cbbc
1Multiply the sides
Area =b×c
2Number first, then a to z
=b×c
3Leave out the × sign
=bc
Remember1Multiply the sides2Number first, then a to z3Leave out the × sign

Write the area using algebraic notation.

mnmn
1Multiply the sides
Area =n×m
2Number first, then a to z
=m×n
3Leave out the × sign
=mn

Write the area using algebraic notation.

yzyz
1Multiply the sides
Area =z×y
2Number first, then a to z
=y×z
3Leave out the × sign
=yz
Remember1Multiply the sides2Number first, then a to z3Leave out the × sign

Write the area using algebraic notation.

fgfg
1Multiply the sides
Area =g×f
2Number first, then a to z
=f×g
3Leave out the × sign
=fg

Write the area using algebraic notation.

daad
1Multiply the sides
Area =a×d
2Number first, then a to z
=a×d
3Leave out the × sign
=ad

Write the area using algebraic notation.

stst
1Multiply the sides
Area =t×s
2Number first, then a to z
=s×t
3Leave out the × sign
=st
Remember1Multiply the sides2Number first, then a to z3Leave out the × sign

Algebraic notation: multiplying worksheet, page 1

Algebraic notation: multiplying worksheet, page 2

Answer sheet

Is it written right? Thumbs up: yes. Thumbs down: no.

  1. 5 × a  =  5a

    Yes

  2. n × 3  =  n3

    No: 3n

  3. b × a  =  ba

    No: ab

  4. y × x  =  xy

    Yes

  5. 4 × k  =  4 + k

    No: 4k

  1. Write n × n using algebraic notation.

    n2 (n squared)

  2. A rectangle has an area of 10xy. What could its two sides be?

    10x and y, for example

  3. Write 2 × m × 5 as simply as you can.

    10m

  1. Write the area using algebraic notation. Step 1 is given.

    7n
    7n

  2. Write the area using algebraic notation.

    km
    km

  3. Write b × 9 using algebraic notation.

    9b
Exit tickets to print