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Sagot :

Answer:

START UP:

1. 4/5 = n/30

5n = 30 × 4

5n = 120

5n/5 = 120/5

n = 24

2. 2/3 = 24/n

2n = 3 × 24

2n = 72

2n/2 = 72/2

n = 36

3. n/6 = 25/30

30n = 25 × 6

30n = 150

30n/30 = 150/30

n = 5

4. 4:7 = 16:n

4n = 7 × 16

4n = 112

4n/4 = 112/4

n = 28

5. n:3 = 30:45

45n = 30 × 3

45n = 90

45n/45 = 90/45

n = 2

MOVE UP:

1. 36:3 = 48:n

36n = 3 × 48

36n = 144

36n/36 = 144/36

n = 4

2. 125:5 = n:7

5n = 125 × 7

5n = 875

5n/5 = 875/5

n = 175

3. 42:7 = n:9

7n = 42 × 9

7n = 378

7n/7 = 378/7

n = 54

4. n:4 = 90:6

6n = 4 × 90

6n = 360

6n/6 = 360/6

n = 60

5. 8:n = 15:105

15n = 8 × 105

15n = 840

15n/15 = 840/15

n = 56

LEVEL UP:

1. 250km ÷ 2 days

= 125km-days

125 × 30days

= 3,750km

2. 330 ÷ 3 hours

= 110 pandesal-hour

110 × 12 hours

= 1,320 pandesal

3. 10km ÷ 5 days

= 2km-days

2 × 7 days

= 14km