Unit 1 Math - Integers

450 = 2 x 3 x 3 x 5 x 5

60 = 2 x 2 x 3 x 5

Use this fact to find the HCF and LCM of 450 and 60.

• HCF = 60

  LCM = 450

• HCF = 30

  LCM = 900

• HCF = 45

  LCM = 1350

• HCF = 20

  LCM = 4500

Work out 30 x -45

• -135.0

• 1350

• -1.5

• -1350

Work out:

2 x -4.88

• -9.76

• -8.76

• 9.76

• -9.67

Fill in the blank spots in this multiplying pyramid.

• Left: 30

  Right: 50

  Top: 1500

• Left: 30

  Right: -50

  Top: -1500

• Left: -30

  Right: -50

  Top: -1500

• Left: -30

  Right: -50

  Top: 1500

Work out:

(3 x -4) : -2

• 6

• 3

• -6

• -6.6

1521 = 3 x 3 x 13 x 13

Use this fact to find √1521

• 152.1

• 9

• 39

• 169

27 x 27 = 9 x 9 x 9 = 729

Use this fact to find √-729

• 27

• Not possible

• -27

• -9

Write the answer to this calculation as powers of 6:

6⁶ x 6⁹

• 6¹⁵

• 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6

• 470184984576

• 12¹⁵

What is the index form and index of:

10³ × 10²

• Index form: 10³ + 10²

  Index: 5

• Index form: 10⁵

  Index: 5

• Index form: 10⁶

  Index: 6

• Index form: 10⁵

  Index: 3 and 2

Calculate the value of 15 x -20

• -300

• 300

• -30

• -150