Unit 2: Section 1 - Standard Form With Negative Indices Examples And Worksheets Page 4

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Exercise XX
Work these out.
2
_
4
_
_
1
_
4
__
3
__
1
_
3
_
1
1
2
3
4
1
1
1
1
7
7
9
9
10
10
8
8
_
_
_
_
_
_
__
__
7
4
3
7
5
1
11
3
5
6
7
8
–
–
1
1
9
9
8
8
6
3
20
10
_
__
7
_
_
_
_
_
_
3
5
3
1
1
3
1
9
10
–
11 3
1 1
12 4
– 2
1
8
12
6
4
4
6
5
2
5
_
1
_
_
3
_
4
3
_
_
7
__
3
_
4
13
14
15
÷
16
÷
3
3
6
3
8
7
4
8
10
5
_
__
_
2
12
3
__
3
17 4 3
18
19
20 6 ÷
3 5
÷ 4
3
4
25
20
_
_
_
_
_
_
_
_
1
2
1
1
1
3
3
1
21 2
3 1
22 1
3 1
23 1
÷
24 3
÷ 1
7
5
4
5
8
4
8
4
5
_
_
3
_
7
_
1
__
3
11
__
_
3
__
7
25 2
1 1
26 3
1 4
27 5
– 2
28 36
– 32
6
4
8
4
10
20
8
12
_
_
_
_
3
7
4
1
29 1
3 3
30 1
3 4
31 1
÷ 6
32 8 ÷ 1
8
3
5
5
Exercise XX*
Work these out.
_
__
_
__
_
__
__
__
1
5
1
9
5
7
11
3
1
2
3
4
1
1
2
2
3
12
20
6
30
20
4
15
_
__
__
_
__
__
_
_
_
_
_
_
1
3
9
1
3
1
1
1
1
1
1
1
5
6
7
1
1
1
2
1
1
1
1
1
5
10
20
4
20
40
8
8
8
8
8
8
5
_
_
5
_
__
20
__
__
_
2
9
8
1
8
9
10 6 3
11
3
3
4
6
8
3
21
25
25
8
__
_
_
_
_
8
5
2
2
1
__
15
_
4
12
13
4 3
14
4 2
15
4
3
3
6
3
3
2
15
16
5
_
_
_
_
_
_
_
2
1
1
2
1
2
1
3
_
__
9
16
17 4
1 3
18 6
1 7
19 7
2 1
3
3
3
2
6
5
3
3
6
5
10
7
_
_
_
_
8
__
__
7
_
1
2
1
1
__
7
20 4
2 3
21 7
22 6
2 4
23 3
2
3
9
3
3
9
12
10
7
15
1
_
2
_
1
_
3
_
_
1
_
4
_
2
24 2
3 4
25 4 3
26 4
27 2
4 2
4
2
3
2
3
4
5
3
( 
)
_
_
_
_
_
1
1
1
1
1
28 3
4 14
29 14 4 3
30
2
1 2
4 2
9
9
8
4
3
Ratio
Example 11
A marinade in a recipe contains rice wine and soy sauce in the ratio 2 : 3.
How much of each ingredient is needed for 100 ml of the mixture?
(Add the ratios together: 2 1 3 5 5.)
_
2
_
3
Then the parts are in the ratio
:
.
5
5
_
_
2
3
Amount of rice wine 5
of 100 5 40 ml. Amount of soy sauce 5
of 100 5 60 ml.
5
5
Exercise XX
1 Divide $392 in the ratio of 3 : 4.
2 Divide 637 m in the ratio of 2 : 5.
3 Divide 752 kg in the ratio of 1 : 7.
4 Divide 243 miles in the ratio of 4 : 5.
5 Divide 984 in the ratio of 7 : 5.
6 Divide 405 in the ratio of 7 : 2.
7 Divide 13.5 in the ratio of 3 : 2.
8 Divide 5.6 in the ratio of 4 : 3.
13

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