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计算:(要求写出计算过程)(1)(14−0.1÷2)×513+1÷1112(2)84911×1.375+105519×0.9(3)(2.5×45)÷(14÷0.8)−0.75÷340(4)8−(7.14×13−229÷2.5)+0.•1.
题目详情
计算:(要求写出计算过程)
(1)(
−0.1÷2)×
+1÷1
(2)84
×1.375+105
×0.9
(3)(2.5×
)÷(
÷0.8)−0.75÷
(4)8−(7.14×
−2
÷2.5)+0.
.
(1)(
1 |
4 |
5 |
13 |
1 |
12 |
(2)84
9 |
11 |
5 |
19 |
(3)(2.5×
4 |
5 |
1 |
4 |
3 |
40 |
(4)8−(7.14×
1 |
3 |
2 |
9 |
• |
1 |
▼优质解答
答案和解析
(1)(
−0.1÷2)×
+1÷1
=(0.25-0.05)×
+1÷
,
=
×
+
,
=
+
,
=1;
(2)84
×1.375+105
×0.9
=
×
+
×
,
=116
+94
,
=(116+94)+(
+
),
=210+1
,
=211
;
(3)(2.5×
)÷(
÷0.8)−0.75÷
=(2.5×0.8)÷(
×
)-
×
,
=2×
-10,
=6
-10,
=-3
;
1 |
4 |
5 |
13 |
1 |
12 |
=(0.25-0.05)×
5 |
13 |
13 |
12 |
=
1 |
5 |
5 |
13 |
12 |
13 |
=
1 |
13 |
12 |
13 |
=1;
(2)84
9 |
11 |
5 |
19 |
=
933 |
11 |
11 |
8 |
2000 |
19 |
9 |
10 |
=116
5 |
8 |
13 |
19 |
=(116+94)+(
5 |
8 |
13 |
19 |
=210+1
47 |
152 |
=211
47 |
152 |
(3)(2.5×
4 |
5 |
1 |
4 |
3 |
40 |
=(2.5×0.8)÷(
1 |
4 |
5 |
4 |
3 |
4 |
40 |
3 |
=2×
16 |
5 |
=6
2 |
5 |
=-3
3 |
5 |
作业帮用户
2017-10-11
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