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脱式计算,能简算的要简算,写出主要计算过程(1)39×3538(2)3.6×(49+56+518)(3)9×(49+114)+514(4)74×89+49×17.
题目详情
脱式计算,能简算的要简算,写出主要计算过程
(1)39×
(2)3.6×(
+
+
)
(3)9×(
+
)+
(4)74×
+
×
.脱式计算,能简算的要简算,写出主要计算过程
(1)39×
(2)3.6×(
+
+
)
(3)9×(
+
)+
(4)74×
+
×
.
(2)3.6×(
+
+
)
(3)9×(
+
)+
(4)74×
+
×
.
35 38 35 35 38 38
+
+
)
(3)9×(
+
)+
(4)74×
+
×
.
4 9 4 4 9 9
+
)
(3)9×(
+
)+
(4)74×
+
×
.
5 6 5 5 6 6
)
(3)9×(
+
)+
(4)74×
+
×
.
5 18 5 5 18 18
+
)+
(4)74×
+
×
.
4 9 4 4 9 9
)+
(4)74×
+
×
.
1 14 1 1 14 14
(4)74×
+
×
.
5 14 5 5 14 14
+
×
.
8 9 8 8 9 9
×
.
4 9 4 4 9 9
.
1 7 1 1 7 7
(1)39×
35 |
38 |
(2)3.6×(
4 |
9 |
5 |
6 |
5 |
18 |
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
(1)39×
35 |
38 |
(2)3.6×(
4 |
9 |
5 |
6 |
5 |
18 |
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
35 |
38 |
(2)3.6×(
4 |
9 |
5 |
6 |
5 |
18 |
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
35 |
38 |
4 |
9 |
5 |
6 |
5 |
18 |
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
4 |
9 |
5 |
6 |
5 |
18 |
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
5 |
6 |
5 |
18 |
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
5 |
18 |
4 |
9 |
1 |
14 |
5 |
14 |
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
4 |
9 |
1 |
14 |
5 |
14 |
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
1 |
14 |
5 |
14 |
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
5 |
14 |
8 |
9 |
4 |
9 |
1 |
7 |
8 |
9 |
4 |
9 |
1 |
7 |
4 |
9 |
1 |
7 |
1 |
7 |
▼优质解答
答案和解析
(1)39×
=(38+1)×
=38×
+1×
=35+
=35
;
(2)3.6×(
+
+
)
=3.6×
+3.6×
+3.6×
=1.6+3+1
=5.6;
(3)9×(
+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
35 38 35 35 3538 38 38
=(38+1)×
=38×
+1×
=35+
=35
;
(2)3.6×(
+
+
)
=3.6×
+3.6×
+3.6×
=1.6+3+1
=5.6;
(3)9×(
+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
35 38 35 35 3538 38 38
=38×
+1×
=35+
=35
;
(2)3.6×(
+
+
)
=3.6×
+3.6×
+3.6×
=1.6+3+1
=5.6;
(3)9×(
+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
35 38 35 35 3538 38 38+1×
=35+
=35
;
(2)3.6×(
+
+
)
=3.6×
+3.6×
+3.6×
=1.6+3+1
=5.6;
(3)9×(
+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
35 38 35 35 3538 38 38
=35+
=35
;
(2)3.6×(
+
+
)
=3.6×
+3.6×
+3.6×
=1.6+3+1
=5.6;
(3)9×(
+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
35 38 35 35 3538 38 38
=35
;
(2)3.6×(
+
+
)
=3.6×
+3.6×
+3.6×
=1.6+3+1
=5.6;
(3)9×(
+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
35 38 35 35 3538 38 38;
(2)3.6×(
+
+
)
=3.6×
+3.6×
+3.6×
=1.6+3+1
=5.6;
(3)9×(
+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
4 9 4 4 49 9 9+
+
)
=3.6×
+3.6×
+3.6×
=1.6+3+1
=5.6;
(3)9×(
+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
5 6 5 5 56 6 6+
)
=3.6×
+3.6×
+3.6×
=1.6+3+1
=5.6;
(3)9×(
+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
5 18 5 5 518 18 18)
=3.6×
+3.6×
+3.6×
=1.6+3+1
=5.6;
(3)9×(
+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
4 9 4 4 49 9 9+3.6×
+3.6×
=1.6+3+1
=5.6;
(3)9×(
+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
5 6 5 5 56 6 6+3.6×
=1.6+3+1
=5.6;
(3)9×(
+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
5 18 5 5 518 18 18
=1.6+3+1
=5.6;
(3)9×(
+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
4 9 4 4 49 9 9+
)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
1 14 1 1 114 14 14)+
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
5 14 5 5 514 14 14
=9×
+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
4 9 4 4 49 9 9+9×
+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
1 14 1 1 114 14 14+
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
5 14 5 5 514 14 14
=4+
+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
9 14 9 9 914 14 14+
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
5 14 5 5 514 14 14
=4+(
+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
9 14 9 9 914 14 14+
)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
5 14 5 5 514 14 14)
=4+1
=5;
(4)74×
+
×
=65
+
=65
.
8 9 8 8 89 9 9+
×
=65
+
=65
.
4 9 4 4 49 9 9×
=65
+
=65
.
1 7 1 1 17 7 7
=65
+
=65
.
7 9 7 7 79 9 9+
=65
.
4 63 4 4 463 63 63
=65
.
53 63 53 53 5363 63 63.
35 |
38 |
=(38+1)×
35 |
38 |
=38×
35 |
38 |
35 |
38 |
=35+
35 |
38 |
=35
35 |
38 |
(2)3.6×(
4 |
9 |
5 |
6 |
5 |
18 |
=3.6×
4 |
9 |
5 |
6 |
5 |
18 |
=1.6+3+1
=5.6;
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
35 |
38 |
=(38+1)×
35 |
38 |
=38×
35 |
38 |
35 |
38 |
=35+
35 |
38 |
=35
35 |
38 |
(2)3.6×(
4 |
9 |
5 |
6 |
5 |
18 |
=3.6×
4 |
9 |
5 |
6 |
5 |
18 |
=1.6+3+1
=5.6;
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
35 |
38 |
=38×
35 |
38 |
35 |
38 |
=35+
35 |
38 |
=35
35 |
38 |
(2)3.6×(
4 |
9 |
5 |
6 |
5 |
18 |
=3.6×
4 |
9 |
5 |
6 |
5 |
18 |
=1.6+3+1
=5.6;
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
35 |
38 |
35 |
38 |
=35+
35 |
38 |
=35
35 |
38 |
(2)3.6×(
4 |
9 |
5 |
6 |
5 |
18 |
=3.6×
4 |
9 |
5 |
6 |
5 |
18 |
=1.6+3+1
=5.6;
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
35 |
38 |
=35+
35 |
38 |
=35
35 |
38 |
(2)3.6×(
4 |
9 |
5 |
6 |
5 |
18 |
=3.6×
4 |
9 |
5 |
6 |
5 |
18 |
=1.6+3+1
=5.6;
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
35 |
38 |
=35
35 |
38 |
(2)3.6×(
4 |
9 |
5 |
6 |
5 |
18 |
=3.6×
4 |
9 |
5 |
6 |
5 |
18 |
=1.6+3+1
=5.6;
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
35 |
38 |
(2)3.6×(
4 |
9 |
5 |
6 |
5 |
18 |
=3.6×
4 |
9 |
5 |
6 |
5 |
18 |
=1.6+3+1
=5.6;
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
4 |
9 |
5 |
6 |
5 |
18 |
=3.6×
4 |
9 |
5 |
6 |
5 |
18 |
=1.6+3+1
=5.6;
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
5 |
6 |
5 |
18 |
=3.6×
4 |
9 |
5 |
6 |
5 |
18 |
=1.6+3+1
=5.6;
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
5 |
18 |
=3.6×
4 |
9 |
5 |
6 |
5 |
18 |
=1.6+3+1
=5.6;
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
4 |
9 |
5 |
6 |
5 |
18 |
=1.6+3+1
=5.6;
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
5 |
6 |
5 |
18 |
=1.6+3+1
=5.6;
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
5 |
18 |
=1.6+3+1
=5.6;
(3)9×(
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
4 |
9 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
1 |
14 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
5 |
14 |
=9×
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
4 |
9 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
1 |
14 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
5 |
14 |
=4+
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
9 |
14 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
5 |
14 |
=4+(
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
9 |
14 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
5 |
14 |
=4+1
=5;
(4)74×
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
8 |
9 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
4 |
9 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
1 |
7 |
=65
7 |
9 |
4 |
63 |
=65
53 |
63 |
7 |
9 |
4 |
63 |
=65
53 |
63 |
4 |
63 |
=65
53 |
63 |
53 |
63 |
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