问题 解答题
0.25×0.07×8
3
4
×(
4
3
-
8
9
1÷[(
1
6
+
1
3
)÷4]
6.8×10.7-0.7×6.8.
答案

(1)0.25×0.07×8

=0.25×8×0.07

=2×0.07

=0.14;

(2)

3
4
×(
4
3
-
8
9

=

3
4
×
4
3
-
3
4
×
8
9

=1-

2
3

=

1
3

(3)1÷[(

1
6
+
1
3
)÷4]

=1÷[

1
2
÷4]

=1÷

1
8

=8;

(4)6.8×10.7-0.7×6.8

=6.8×(10.7-0.7)

=6.8×10

=68.

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