来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/09/21 10:34:42
(1)
6
7-
6
7÷
2
3×
1
6,
=
6
7-
6
7×
3
2×
1
6,
=
6
7-
3
14,
=
9
14;
(2)
8
9×[
3
4-(
7
16-
1
4)],
=
8
9×[(
3
4+
1
4)-
7
16],
=
8
9×[1-
7
16],
=
8
9×
9
16,
=
1
2;
(3)24×
51
43+51×
19
43,
=
24
43×51+51×
19
43,
=(
24
43+
19
43)×51,
=1×51,
=51;
(4)0.25×(1.6+1.6+1.6+1.6),
=0.25×4×1.6,
=1×1.6,
=1.6.