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Thousands Ones

H T O H T O

1000 5000

Eighty thousand 84 490

69 029 74 738

69 000 78 011

−− − − +

+

++ = + + + +

= += + −

− 1

343 443442

+ = + − − = − −

− = − + + = +

× = × +× +

× = + × = × + ×

186 ÷ 3 = 62

186 ÷ 6 = 124

× 2 × 2

186 ÷ 3 = 62

186 ÷ 6 = 31

× 2 ÷ 2

× = × × ×= × × = × =

× = × × = × ×

÷ < ÷

× =

×

×

×

×÷

÷ ×

×

÷

× ×

× ×

= ×

= × = ×

4 × 103 g 8.4 × 101.5 l 42 000 kg

150 000 000 km 0.3 × 104 cm2 36 × 105 m

× × × × × ×

HTh TTh Th H T O

× ×

= ×

× × × × × ×

0.004

4 × 10-30.04

4 × 10-20.45

4.5 × 10-1

0.045

4.5 × 10-3

=

=

14.6 14.65 14.714.629

5 . 2 0 9 6

=

0 10000 20000 30000

24090

= == × ≠ ×

= × × ≠ ×

𝑥7 cm

7 c

m 25 cm2

Area = 7 × 7= 72

= 49 cm2

Area = 25𝑥2 = 25

𝑥 = 25

= 5 cm

23(−2)3

(−3)222

8

4

4

93

38

2

32

≤ 𝑥 < ≤ 𝑥 <

𝑥 =

==

1.2 1.3 1.4 1.5 1.6

1.25 ≤ 𝑥 < 1.35

143

100 40 3

79 7

09

× 100 40 3

70

9

3 4 7

+ 5 6

3 9 1 3

1 2 1

6 7 1 5 6

× 100 40 3

70 700 280 210

9 900 360 27

1

2

1

4 7

− 7 8

1 7 1

7 0 0

2 8 0

2 1 0

9 0 0

3 6 0

+ 1 2 7

2 4 7 7

÷÷

× =

4.5 ÷ 0.3 = 0.15

45 ÷ 3 = 15

× 10 ÷ 100× 10

4.5 × 0.3 = 1.45

45 × 3 = 145

× 10 ÷ 100× 10

0.32 × 0.4 = 0.144

32 × 4 = 144

× 100 × 1000× 10

0.32 × 0.4 = 0.144

32 × 4 = 144

× 100 ÷ 1000× 10

7.8 × 3.1 = 24.18

78 × 31 = 2418

× 10 ÷ 100× 10

7.8 × 3.1

8 × 3 = 24

8 × 105 + 6 × 105 14 × 105

× × × = × × ×= × × × × × ×= × ×= ×

× + ×

× × × ×

× ÷ ×

× × × ×

+ 𝜋 = 𝜋

50 cm2 16𝜋 cm2 50.26548246 cm2 50.3 cm2

t

4

𝜋5

A = l × w

= 4 × t

= 4t

A = 𝜋𝑟2

= 𝜋 × 52

= 25𝜋

A = l × w

= 𝜋 × 𝜋= 𝜋2

P =𝜋d2+ 16

=16𝜋2

+ 16

= 8𝜋 + 16

8