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(2012•华亭县模拟)计算﹙用你喜欢的方法﹚ 518

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(2012•华亭县模拟)计算﹙用你喜欢的方法﹚
5
18
(2012•华亭县模拟)计算﹙用你喜欢的方法﹚ 518
(1)
5
18÷5+
1
18×
1
5,
=
5
18×
1
5+
1
18×
1
5,
=(
5
18+
1
18)×
1
5,
=
1

1
5,
=
1
15;

(2)0.25×1.25×320,
=0.25×1.25×(40×8),
=(0.25×40)×(1.25×8),
=10×10,
=100;

(3)19.98×37-199.8×1.9+1998×0.82,
=1998×0.37-1998×0.19+1998×0.82,
=1998×(0.37-0.19+0.82),
=1998×1,
=1998;

(4)﹙
1
6-
1
4+
1
3﹚×12,
=
1
6×12-
1
4×12+
1
3×12,
=2-3+4,
=3;

(5)[1-﹙
1
4+
3
8﹚]÷
3
4,
=[1-
5
8]÷
3
4,
=
3

3
4,
=
1
2;

(6)[
9
16+0÷﹙
1
7+