Question

1- Arme e efetue : VALE 14 PONTOS - ME AJUDE
a) 1.554 x 40 
b) 2.345 x 12
c) 15.830 x 8
d) 12.802 x 15
e) 10.836 x 100
f) 8.560 x 1000

Answer 1

a) => 1554 X 40= (10 X 1554) X 4= 15540 X 4= 62.160
b)=> 2345 x 12 = (10 x 2345) x 2 = 23450 x 2 = 304.140
c) => 15830 x 8 = (15830 x 10) - (15830 x 2) = 158300 - 31660 = 126.640
d) => (12802 x 30)/2 = 384060/2 = 192.030
e) => 10.836 x 100= 1083600 x 1 = 1.083.600
f) 8560 x 1000 = 8560000 x 1 = 8.560.000

Answer 2

a) 1.554 

        x40

      0000

    6216

    62160

b)2.345

      x12   

    2690

  4345    

   46140

c)15.830

           x8 

  126640

d)12.802

         x15

   94010

 12802 

222030

e)10.836

      x100 

    00000

  00000

10836

10836

f)8.560

x1000  

     0000

   0000

 0000

8560    

856000