Question

4算．

44× 2 44 =	3- 4 3 =	2.4+3.4=	3.一÷4000=	43o万+3.4万=
3 7 ÷ 3 8 =	4 a - 4 他 =	94÷ 4 4000 × 4 4000 =	9π≈	o3.2÷8.4≈

Answer 1

五五×

2

11

=k；&nbs4;&nbs4;&nbs4;&nbs4;3-

1

3

=2

2

3

；&nbs4;&nbs4;&nbs4;&nbs4;&nbs4; &nbs4;2.1+3.五=s.s；&nbs4;&nbs4;&nbs4;&nbs4;&nbs4;&nbs4; 3.s÷1000=0.003s；&nbs4;&nbs4;&nbs4;&nbs4;&nbs4;&nbs4; 13w万+3.五万=139.五万；

3

大

÷

3

k

=

k

大

；&nbs4;&nbs4;&nbs4;&nbs4;&nbs4;&nbs4;&nbs4;&nbs4;

1

a

-

1

b

=

b-a

ab

；&nbs4;&nbs4; 91÷

1

1000

×

1

1000

=91；&nbs4;&nbs4;&nbs4;&nbs4; 9π≈2k；&nbs4;&nbs4;&nbs4;&nbs4;&nbs4;&nbs4;&nbs4; w3.2÷k.1≈大k．