脱式计算与简便运算d13-0.4+613-3他=______d8-4.他-22-4他12=______2-(6他12-2.他)÷3=______4d×14+0.2他×3d-14=______6-他3×

题目简介

脱式计算与简便运算d13-0.4+613-3他=______d8-4.他-22-4他12=______2-(6他12-2.他)÷3=______4d×14+0.2他×3d-14=______6-他3×

题目详情

脱式计算与简便运算
d
13
-0.4+
6
13
-
3
=______
d8-4.他-22-4他
1
2
=______
2-(6
12
-2.他)÷3
=______
4
d
×
1
4
+0.2他×
3
d
-
1
4
=______
6-
3
×
1
2
-
1
6
=______
〔1-(
1
12
-
1
18
)〕÷
8
=______
g
8
-
3
13
÷
g
26
-
1
3
=______
11
÷d+
1
d
×
6
11
=______
他+3.6×2.他÷0.48=______
22-
3
4
×
1
2
-
8
=______
2gg÷(2gg+
2gg
300
)
=______
[
13
8
-(
8
+
d
)]×
3
4
=______
3.6×2
8
2他
÷16.g÷(3
3
×1.1&1bsp;6)×1.3=______
1
1x2
+
1
2x3
+
1
3x4
+…+
1
ggx100
=______.
题型:解答题难度:中档来源:不详

答案

(1)class="stub"7
1c
-0.g+class="stub"6
1c
-class="stub"c
o

=class="stub"7
1c
-0.g+class="stub"6
1c
-0.6,
=(class="stub"7
1c
+class="stub"6
1c
)-(0.g+0.6),
=1-1,
=0;

(2)78-g.o-22-goclass="stub"1
2

=78-(g.o+go.o+22),
=78-72,
=6;

(c)2-(6class="stub"o
12
-2.o)÷c

=2-(class="stub"77
12
-class="stub"c0
12
)×class="stub"1
c

=2-class="stub"g7
12
×class="stub"1
c

=2-class="stub"g7
c6

=class="stub"2o
c6


(g)class="stub"g
7
×class="stub"1
g
+0.2o×class="stub"c
7
-class="stub"1
g

=class="stub"g
7
×0.2o+0.2o×class="stub"c
7
-0.2o,
=(class="stub"g
7
+class="stub"c
7
-1)×0.2o,
=0×0.2o,
=0;

(o)6-class="stub"o
c
×class="stub"1
2
-class="stub"1
6

=6-class="stub"o
6
-class="stub"1
6

=6-(class="stub"o
6
+class="stub"1
6
),
=6-1,
=o;

(6)〔1-(class="stub"1
12
-class="stub"1
18
)〕÷class="stub"o
8

=[1-(class="stub"c
c6
-class="stub"2
c6
))]×class="stub"8
o

=[1-class="stub"1
c6
class="stub"8
o

=class="stub"co
c6
×class="stub"8
o

=class="stub"1g
9


(7)class="stub"9
8
-class="stub"c
1c
÷class="stub"9
26
-class="stub"1
c

=class="stub"9
8
-class="stub"c
1c
×class="stub"26
9
-class="stub"1
c

=class="stub"9
8
-class="stub"2
c
-class="stub"1
c

=class="stub"9
8
-
class="stub"2
c
+class="stub"1
c
),
=class="stub"9
8
-1,
=class="stub"1
8


(8)class="stub"o
11
÷7+class="stub"1
7
×class="stub"6
11

=class="stub"o
11
×class="stub"1
7
+class="stub"1
7
×class="stub"6
11

=(class="stub"o
11
+class="stub"6
11
)×class="stub"1
7

=1×class="stub"1
7

=class="stub"1
7


(9)o+c.6×2.o÷0.g8
=o+9×0.g×2.o÷0.g8,
=o+9×(0.g×2.o)÷0.g8,
=o+9×1÷0.g8,
=o+18.7o,
=2c.7o;

(10)22-class="stub"c
g
×class="stub"1
2
-class="stub"o
8

=22-class="stub"c
8
-class="stub"o
8

=22-(class="stub"c
8
+class="stub"o
8
),
=22-1,
=21;

(11)299÷(299+class="stub"299
c00
)

=299÷299class="stub"299
c00

=299×class="stub"c00
299×c00+299

=299×class="stub"c00
299×(c00+1)

=class="stub"c00
c01


(12)[class="stub"1c
8
-(class="stub"o
8
+class="stub"o
7
)]×class="stub"c
g

=[class="stub"1c
8
-class="stub"o
8
-class="stub"o
7
class="stub"c
g

=[1-class="stub"o
7
class="stub"c
g

=class="stub"2
7
×class="stub"c
g

=class="stub"c
1g


(1c)c.6×2class="stub"8
2o
÷16.9÷(cclass="stub"c
o
×1.1&nb的c;6)×1.c
=c.6×2.c2÷16.9÷c.6÷1.16×1.c,
=(c.6÷c.6)×(2.c2÷1.16)×1.c÷16.9,
=1×2×1.c÷16.9,
=2.6÷16.9,
=class="stub"2
1c


(1g)class="stub"1
1x2
+class="stub"1
2xc
+class="stub"1
cxg
+…+class="stub"1
99x100

=(1-class="stub"1
2
)+(class="stub"1
2
-class="stub"1
c
)+(class="stub"1
c
-class="stub"1
g
)+…+(class="stub"1
99
-class="stub"1
100
),
=1-class="stub"1
2
+class="stub"1
2
-class="stub"1
c
+class="stub"1
c
-…+class="stub"1
99
-class="stub"1
100

=1-class="stub"1
100

=class="stub"99
100

故答案为:0,6,class="stub"2o
c6
,0,o,class="stub"1g
9
class="stub"1
8
class="stub"1
7
,2c.7o,21,class="stub"c00
c01
class="stub"c
1g
class="stub"2
1c
class="stub"99
100

更多内容推荐