### Registration Activities Year 7

```Dŵr y Felin Comprehensive School
Key Stage 3
Numeracy in Registration - Homework
Name ……………………………………..
FOUR RULES OF NUMBER
Remember – It is often easier to work out the answer to a question if you set out the
sum in the correct way.
Examples
1. 3451 + 817
3451
+ 817
4268
2.
3 1
438 – 392
4 38
392
046
-
1
3. 34 x 7
x
34
7
23 8
4.
276 x 26
x
2
276
26
1 64536
51512 0
7176
1
5.
687 ÷ 3
229
3 6 827
Exercise
892
1.
810 + 81
=
=
19 x 19
10.
819 + 2800 =
11.
904 - 730
=
174
12.
44.7 x 0
=
0
13.
231 x 10
= 2310
14.
25 x 17
=
425
=
405
4778
2.
4230 + 548 =
3.
536 - 70
=
4.
36 ÷ 6
=
5.
18 x 22
=
6.
982 -156
=
7.
50 ÷ 5
=
10
15.
872 - 467
8.
24 x 8
=
192
16.
29.9 + 3
466
6
396
826
361
9.
=
3619
32.9
FRACTION OF AN AMOUNT
To find a fraction of an amount we divide by the denominator (bottom) and then
multiply by the numerator (top)
Examples
1. ½ of 30 = 30 = 15
2
3.
2
5
of 30 = 30 = 6
5
=6x2
= 12
2.
1
4.
3
7
8
of 42 = 42 = 6
7
of 48 = 48 = 6
8
=6x3
= 18
Exercise
9.
1
8
10.
3
of 70 =
7
11.
2
of 16 =
8
6
12.
1
1.
½ of 60=
2.
1
3.
4.
of 64 =
8
1
10
3
30
3
of 80 =
24
13.
6.
3
of 25 =
15
7.
5
of 18 =
6
8.
1
5.
10
5
8
of 40 =
of 88
=
of 24
4
=
4
5
of 35
=
of £160 =
8
22
18
14
£20
9
of 99 =
14.
1
of 380m = 190
15
15.
3
of \$28 = \$12
5
16.
11
2
7
2
3
of 96
81
= 64
ROUNDING
Examples
Round the following numbers to the number of decimal places in brackets.
37.178 (1 decimal place) = 37.178 = 37.2
56.353 (2 decimal places) = 56.353 = 56.35
38.9010 (3 decimal places) = 38.9010 = 38.901
If the number that is underlined is greater or equal to 5, the number that is bold
rounds up one. If the number that is underlined is less than 5 then it is ‘chopped off’
Exercise
1.
4.123(1decimal place)
=
4.1
2.
64.892 (1decimal place)
=
64.9
3.
7.901 (2 decimal places)
=
7.90
4.
4.932 (2 decimal places)
=
4.93
5.
73.9912 (3 decimal places) =
73.991
6.
6.9009 (3 decimal places) =
6.901
7.
71.1928 (3 decimal places) =
71.193
8.
7.102 (1 decimal place)
7.1
9.
28.837 (2 decimal places) =
28.84
10.
18.728 (1 decimal place)
18.7
11.
12.0003 (3 decimal places) =
12.000
12.
4.99
5.0
place)
(1
=
=
=
decimal
MULTIPLYING DECIMALS
0.3 has one number after
the decimal point, 0.2 also
has one number after the
decimal point.
So the
numbers after the decimal
point.
Examples.
1. 0.3 x 0.2 = 0.06
2. 0.7 x 4 = 2.8
0.7 has one number after
the decimal point, 4 is a
whole number so doesn’t
have any numbers after the
decimal point.
So the
number after the decimal
point.
Exercise
Work out the following multiplication sums. Be careful where you place the decimal point in each
1.
0.6 x 3
= 1.8
2.
5 x 0.6
=
3.
0.4 x 0.8 =
3.0
0.32
7. 0.5 x 0.08
=
8. 0.07 x 0.7
=
9. 0.2 x 0.009
=
0.01
4.
0.1 x 0.1 =
10. 1.4 x 0.6
0.7 x 0.2 =
0.05 x 9 =
0.0018
=
1.30
11. 2.6 x 0.5
=
0.45
6.
0.049
0.84
0.14
5.
0.040
0.144
12. 2.4 x 0.06
=
```