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脱式计算.(1)2091-2091÷17(2)(34-34×25)÷15(3)1.28×2.37-2.8×0.237(4)(512+119)×12+719.
题目详情
脱式计算.
(1)2091-2091÷17
(2)(
-
×
)÷
(3)1.28×2.37-2.8×0.237
(4)(
+
)×12+
.
-
×
)÷
(3)1.28×2.37-2.8×0.237
(4)(
+
)×12+
.
3 3 4 4
×
)÷
(3)1.28×2.37-2.8×0.237
(4)(
+
)×12+
.
3 3 4 4
)÷
(3)1.28×2.37-2.8×0.237
(4)(
+
)×12+
.
2 2 5 5
(3)1.28×2.37-2.8×0.237
(4)(
+
)×12+
.
1 1 5 5
+
)×12+
.
5 5 12 12
)×12+
.
1 1 19 19
.
7 7 19 19
(1)2091-2091÷17
(2)(
3 |
4 |
3 |
4 |
2 |
5 |
1 |
5 |
(3)1.28×2.37-2.8×0.237
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
3 |
4 |
3 |
4 |
2 |
5 |
1 |
5 |
(3)1.28×2.37-2.8×0.237
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
3 |
4 |
3 |
4 |
2 |
5 |
1 |
5 |
(3)1.28×2.37-2.8×0.237
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
3 |
4 |
2 |
5 |
1 |
5 |
(3)1.28×2.37-2.8×0.237
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
2 |
5 |
1 |
5 |
(3)1.28×2.37-2.8×0.237
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
1 |
5 |
5 |
12 |
1 |
19 |
7 |
19 |
5 |
12 |
1 |
19 |
7 |
19 |
1 |
19 |
7 |
19 |
7 |
19 |
▼优质解答
答案和解析
(1)2091-2091÷17,
=2091-123,
=1968;
(2)(
-
×
)÷
,
=
×(1-
)×5,
=
×
×5,
=
;
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
+
)×12+
,
=
×12+
×12+
,
=5+(
+
),
=5+1,
=6.
3 3 34 4 4-
×
)÷
,
=
×(1-
)×5,
=
×
×5,
=
;
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
+
)×12+
,
=
×12+
×12+
,
=5+(
+
),
=5+1,
=6.
3 3 34 4 4×
)÷
,
=
×(1-
)×5,
=
×
×5,
=
;
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
+
)×12+
,
=
×12+
×12+
,
=5+(
+
),
=5+1,
=6.
2 2 25 5 5)÷
,
=
×(1-
)×5,
=
×
×5,
=
;
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
+
)×12+
,
=
×12+
×12+
,
=5+(
+
),
=5+1,
=6.
1 1 15 5 5,
=
×(1-
)×5,
=
×
×5,
=
;
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
+
)×12+
,
=
×12+
×12+
,
=5+(
+
),
=5+1,
=6.
3 3 34 4 4×(1-
)×5,
=
×
×5,
=
;
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
+
)×12+
,
=
×12+
×12+
,
=5+(
+
),
=5+1,
=6.
2 2 25 5 5)×5,
=
×
×5,
=
;
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
+
)×12+
,
=
×12+
×12+
,
=5+(
+
),
=5+1,
=6.
3 3 34 4 4×
×5,
=
;
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
+
)×12+
,
=
×12+
×12+
,
=5+(
+
),
=5+1,
=6.
3 3 35 5 5×5,
=
;
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
+
)×12+
,
=
×12+
×12+
,
=5+(
+
),
=5+1,
=6.
9 9 94 4 4;
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
+
)×12+
,
=
×12+
×12+
,
=5+(
+
),
=5+1,
=6.
5 5 512 12 12+
)×12+
,
=
×12+
×12+
,
=5+(
+
),
=5+1,
=6.
1 1 119 19 19)×12+
,
=
×12+
×12+
,
=5+(
+
),
=5+1,
=6.
7 7 719 19 19,
=
×12+
×12+
,
=5+(
+
),
=5+1,
=6.
5 5 512 12 12×12+
×12+
,
=5+(
+
),
=5+1,
=6.
1 1 119 19 19×12+
,
=5+(
+
),
=5+1,
=6.
7 7 719 19 19,
=5+(
+
),
=5+1,
=6.
12 12 1219 19 19+
),
=5+1,
=6.
7 7 719 19 19),
=5+1,
=6.
=2091-123,
=1968;
(2)(
3 |
4 |
3 |
4 |
2 |
5 |
1 |
5 |
=
3 |
4 |
2 |
5 |
=
3 |
4 |
3 |
5 |
=
9 |
4 |
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
=
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
3 |
4 |
3 |
4 |
2 |
5 |
1 |
5 |
=
3 |
4 |
2 |
5 |
=
3 |
4 |
3 |
5 |
=
9 |
4 |
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
=
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
3 |
4 |
2 |
5 |
1 |
5 |
=
3 |
4 |
2 |
5 |
=
3 |
4 |
3 |
5 |
=
9 |
4 |
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
=
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
2 |
5 |
1 |
5 |
=
3 |
4 |
2 |
5 |
=
3 |
4 |
3 |
5 |
=
9 |
4 |
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
=
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
1 |
5 |
=
3 |
4 |
2 |
5 |
=
3 |
4 |
3 |
5 |
=
9 |
4 |
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
=
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
3 |
4 |
2 |
5 |
=
3 |
4 |
3 |
5 |
=
9 |
4 |
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
=
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
2 |
5 |
=
3 |
4 |
3 |
5 |
=
9 |
4 |
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
=
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
3 |
4 |
3 |
5 |
=
9 |
4 |
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
=
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
3 |
5 |
=
9 |
4 |
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
=
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
9 |
4 |
(3)1.28×2.37-2.8×0.237
=1.28×2.37-0.28×2.37,
=(1.28-0.28)×2.37,
=1×2.37,
=2.37;
(4)(
5 |
12 |
1 |
19 |
7 |
19 |
=
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
5 |
12 |
1 |
19 |
7 |
19 |
=
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
1 |
19 |
7 |
19 |
=
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
7 |
19 |
=
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
5 |
12 |
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
1 |
19 |
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
7 |
19 |
=5+(
12 |
19 |
7 |
19 |
=5+1,
=6.
12 |
19 |
7 |
19 |
=5+1,
=6.
7 |
19 |
=5+1,
=6.
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