Numeracy: maths in your head - lesson starters and enders

10% of 50
30-6
A quarter of 20
The third odd
number
15% of 100
3x5
A quarter of 60
20 take away 5
25% of 100
5 2
15
A quarter of 100
A half of 50
35% of 100 %j
7x5 •
5 less than 40
A half of 70
45% of 100
9x5
5 less than 50
A half of 90
55% of 100
11 x5
5 less than 60
25 plus 30
35 plus 30
13x5
5 less than 70
The sum of 61
and 4
50 plus 25
3x25
5 more than 70
Three quarters
of 100
50 plus 35
5 x 17
5 more than 80
15 less than 100
50 plus 45 ^1
5x19 M
5 more than 90
5 less than 100
•
2 lots of 8
4 2
20% of 80
Half of 32
13 plus 13
2 x 13
30 take away 4
• 9 plus 8 16 17
•28-11
26
Number of weeks
in half a year
Half of 92
20 plus 26
4 less than 50
10 more than 6
8x7 ETj
30 plus 26
4 less than 60
20 more than 6 2
11x6
3 x 22
4 less than 70
Treble 22
80 minus 4 j
2 x 38
66
10 more than 66
10 less than 86
90 minus 4
2x43
10 more than 76
10 less than 96
12x8 £TJ
2 x 48
10 more than 86
100 minus 4
• 2 more than 15
•17% of 100
• 3 3
•9x3
• 30 minus 3
• 5 more than 22
• 40 minus 3
•6 2
+ 1
• Half of 74
27
•The sum of 35
and 2
• 50 minus 3 47
• 40 plus 7
• 8 more than 39
• Next prime
number after 43
• 60 minus 3
• 50 plus 7
• 8 more than 49
• Treble 19
• 70 minus 3
• 40 plus 27
• 3 less than 70
1
57
j.
Next prime
number after 61
•15 + 3
3x6
1
7 less than 25
' Double 9
• 2 times 14
• 30 minus 2
• Number,of days
in 4 weeks
• The product of
7 and 4
•2 times 19 ^
• 40 minus 2 H
• 12 less than 50
• 3 more than 35
4x12
• 50 minus 2
8x6
1
3 more than 45
30 plus 28
1
60 minus 2
Double 29
1
3 more than 55
'2x34
• 70 minus 2
' 8 more than 60
•4 x 17
• 13 plus 6 18 19
•38-2
28
58
•3 2
+ 10
• One less than 20
• Add 8 to 21
• 30 minus 1
• 21 less than 50
•5 2
+ 4
• 25 plus 24
• 50 minus 1 B
• 11 less than 60
•7 2
• 55 plus 4
• 60 minus 1 •
• The sum of 49
and 10
• 9 more than 50
29
3x23 68 69
70 minus 1
11 less than 80
• The difference
between 100 and 31
f/H •7x -7x11 11 wjjri -Treble •Treble 26 wl»i . 75 plus 4 f7«j
toWMU 50 • plus 50 plus 27 27 HHl 80 ' minus 80 minus 2 2 • 80 minus 1 • • •
3 less than 80
85 subtract 8
m • Treble 29
8X11
• 50 plus 37
• 3 less than 90
• 95 subtract 8
• 44 add 53
• 95 plus 2
• 3 less than 100
• The largest two
digit prime number
i
1
1
8 more than 70
Double 40 then
minus 2
1
90 minus 2 Hi
1
8 more than 80
Double 44
50 add 48 [jl
100 minus 2 Ml
1
8 more than 90
1
Double 49
• 11 less than 90
• The difference
between 100 and 21
• 85 plus 4 ^jTjl
• 90 minus 1 fe^Ml
• 9 more than 80
• The difference
between 100 and 11
•3x33
• 9x11 to
• 9 more than 90
»The difference
between 100 and 1