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Sagot :

Bonjour

1)

A = 25/5 + 3

A = 5 + 3

A = 8

B = 12 - 36-4

B = 12 - 9

B = 3

C = 88/11 : 10

C = 8 : 10

C = 0,8

2)

28 x 50 x 2 = 50 x 2 x 28 = 100 x 28 = 2 800

25 x 3,41 x 4 = 25 x 4 x 3,41 = 100 x 3,41 = 341

0,3 + 0,54 + 0,7 = 0,3 + 0,7 + 0,54 = 1 + 0,54 = 1,54

498 + 1 300  + 700 = 498 + 2 000 = 2 498

3)

500 + 25 x 4 + 300 : 2 - 54 : 9 x 100

= 500 + 100 + 150 - 6 x 100

= 600 + 150 - 600

= 150

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