文档介绍:7X
x 30%=
1 1+ 15=
2
一十 - x 0=
3 3 4
— =
8X =
1 1 x 8+ 11 X2 =
22
1
——
1
1
2
3
1
5
1-X 4+4 X-=
54
—=
31
—+ —=
43
4+ 2 =
77
-
98
X 100 =
.10
3
142- 69=
+ 4 =
3 0 x——=
37
+ =
4
8— 3-=
15
6 v 5
25 12
1800-799 =
560+ 8X 7 =
-X 4+4 X -=
54
31 X 197"
…1八1
9x — — 9 ^ - =
99
+8=
- =
1」=
78
+ 2■ + =
3
1+1+5 =
32
+ =
(1+ 1 ) X4 =
48
X =
4
89 3
9 , 2 _ — —=
103
X 5 + +6= 6
1-- 3
—=
8
1
48 ()=
4 6
x 9+ =
31cc
—+ — + X8=
46
+ 26=
60-14=
1 _
8 一
2 3
—X —=
3 4
19+24 =
X =
84+7 =
-
+ =
(5+ 1 - 86
1
—)X 24=
12
— =
」2」
33
=
32+ 53X 0 =
35
——x———
20 24
6+2%=
+ —=
5
- =
3 , 1
—I—=
8 3
x =
+ =
58
—x —=
1615
X — X = 17
+ 8=
38-19=
+ =
14上
--7=
19
+ =
3
x 8 =
0 + =
15
-16 =
4X 1 +4X
1 =
2
2
+ =
+ 8=
1c.
_ X _ + 2X 15 =
5
c,2
乂匕=
7
3 5
4-8 - 8
1 + =
5
4X6 =
+ =
X 10% =
1-35% =
400+ 25+8=
1
—
4
5— — =
20X 500=
199+65=
2
X-
5
+
+=
2- X —=
511
(---)X 20=
45
1 — X =
8
420+590=
72+3 =
x - =
9
“31
=——=
42
X 16=
+=
11
(二十一
)X 4=
3
1
4
4 =
7
1
77-
x -=
9
7
, 1
1、
一-)
4
5
X 20=
1 1 X =
8
1 + 10%=
1-=
2+2%=
5
6
125X =
+=
8+20 =
2-3
5
100X 1%=
4
4
-=
3 .
11 . 3
——
——————
5
555
x 8=
3
2
-X
-=
4
3
1
1
(尸
3)X 24=
3 2
1 +
-x -= 2 3
1 -
c1
3——=
3 1
——
2006 - 619 =
-=
+=
88- 55 =
199+65 =
X =
2+ =
1+1+4=
5 6 5
571-402 =
11
( 4- 2-) X8 =
+ =
1
—X
8
10+
+
8=
10- =
4 =
- =
2 - -=
8
+ =
C 11
2 — X 4 X —=
25
25 X 24 =