Question

计算能简便的要简便计算8.03-3.16-3.84 3780÷35+13×308 &n...

计算能简便的要简便计算8.03-3.16-3.84 3780÷35+13×308 25×3.2×1254÷45-45÷4 45×6.7+4.3×0.8-80% （16+29-118）×36．

Answer 1

①8.03-3.16-3.84       
=8.03-（3.16+3.84）
=8.03-7
=1.03

②3780÷35+13×308         
=108+13×（300+8）
=108+13×300+13×8
=108+3900+104
=212+3900
=4112

③25×3.2×125
=（25×4）×（0.8×125）
=100×100
=10000

④4÷

4

5

-

4

5

÷4
=4÷0.8-0.8÷4
=5-0.2
=4.8

⑤

4

5

×6.7+4.3×0.8-80%
=0.8×6.7+4.3×0.8-0.8×1
=0.8×（6.7+4.3-1）
=0.8×10
=8

⑥（

1

6

+

2

9

-

1

18

）×36
=

1

6

×36+

2

9

×36-

1

18

×36
=6+8-2
=12