Question

1)12.194+6.437.2+3,369.4

2)1+5+9+13+........+57+61+65.2-26

3)8.9.14+6.17.12+19.4.18

4)1+2-3-4-5+6-7-8+9+994-995-996+997+998

5)1994.19931993-1993.19941994

Answer 1

1)12.194+6.437.2+3,369.4=12.194+12.437+12,369=12.(194+437+369)=12x1000=12000

2)1+5+9+13+........+57+61+65.2-26

3)8.9.14+6.17.12+19.4.18=72x14+72x17+19.72=72x(14+17+19)=72x50=3600

4)1+2-3-4-5+6-7-8+9+994-995-996+997+998

5)1994.19931993-1993.19941994=0

Answer 2

nhanh lên gấp lắm .nhanh lên nhen

Answer 3

1) 12000

3) 3600

5)0