Question

TOATE 4 REPEDE!!!!!!​

Answer 1

Răspuns:

ex 1

a) ( 72 : 9 + 9 ) × 5 = 85

( 8 + 9 ) × 5 =

17 × 5 = 85

b) ( 7 × 9 - 13 ) : 5 = 10

( 63 - 13 ) : 5 =

50 : 5 = 10

ex 2

a) 7 × 5 : 5 = 7

35 : 5 = 7

b) 42 : 7 × 9 = 54

6 × 9 = 54

c) 85 - 8 × 5 + 20 = 65

85 - 40 + 20 =

45 + 20 = 65

ex 4

80 × ( 4 × 4 - 4 : 4 - 4 × 4 : 4 ) = 880

80 × ( 16 - 1 - 16 : 4 ) =

80 × ( 16 - 1 - 4 ) =

80 × ( 15 - 4 ) =

80 × 11 = 880

ex 3

( 1 + 2 ) × ( 1 + 5 ) = 18

3 × 6 = 18

a = 1 b = 1

( 0 + 2 ) × ( 4 + 5 ) = 18

2 × 9 = 18

a = 0 b = 4