内容正文:
15
2
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(
*
)
!
1
./
UVWXPYZ
(
+,
5
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1
4×
2
5=
17×916=
3
2×5=
5
8×
3
5=
5
7×
21
25=
0.25×25=
5
6×18=
2
3×
9
10=
7
10×
6
5=
9
10×
6
25=
7
8×
3
7=
15×23=
7
12×
3
14=
3
11×2=
5.6×78=
14×221=
2.4×512=
50
13×0.78=
15×35=
7
30×3=
7
9×
6
7=
14
25×
10
7=
0.8×512=
8
7×
5
21=
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6
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24
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10
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9
14×14×
2
9 1-( )17 × 116×14( )3 2-89×34-13
30× 16+
2
5-( )12 125× 56+( )34 +45 38×7+38
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6
$%'()* *$% +
16
!
2
./
[\WXPYZ
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+,
5
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3
5×
1
15=
5
8×
7
15=
8
15×3=
11
18×
9
22=
17×734=
28
15×
15
14=
5
6×
2
15=
2
3×
9
10=
5
18×15=
19
20×60=
1
30×
15
16=
0.32×1716=
2
5×
4
3=
7
9×
3
5=
4
11×
11
12=
3
5×60=
3
7×
21
31=
0.84×1021=
3
5×3=
5
16×
8
15=
7
15-
2
5=
45×310=
10
27×
9
5=
1.35×45=
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6
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10
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1
50×42×100
5
16×
2
3×
4
15
6
5+
9( )10 ×150
2
3+
5
4×0.4-
5
6
8
15-
3
8×
8
15
3
4×
2
5+
1
4×
2
5+
2
5
! &
6
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17
!
3
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5
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3
16×
4
15=
9
14×
7
12=
0.06×518=
1
2×
3
8=
3
7×
3
5=
29
30-
7
10=
3
4×
2
5=
3.2×34=
9
20×2.5=
9
4×
2
27=
5
16×
8
15=
3
8×
1
9=
17
15×60=
0.75×215=
0.4×13=
9
2×
1
6=
10×45=
36×1124=
8
15×
3
2=
11
15×1.5=
4
5-
1
3=
7
10+
1
5=
8
9×
9
16=
12
58×
29
36=
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6
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$%'()* *$% +
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120× 12-
5( )12 1241×1922×4136 215+1( )12 ×3+35
98
99×100-
98
99
3
5-
4( )15 × 78+( )14 114×1314-100×1314
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18
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4
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12.
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5
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1
3×1.4=
9
11+
3
22=
3
4×
3
8=
27
8×
5
18=
5
21×0.63=
5
3×1.8=
1
2×
5
8=
1
3×
1
3=
4
5-
1
3=
4.9×57=
0.72×1312=
5
12×
3
10=
9
10-
7
30=
2
3+
1
9=
2
5+
7
15=
7.8×213=
0.42×87=
123×
3
5=
0.26×1013=
0.3×19=
24×54=
1
16×
2
3=
4
21×0.42=
9
14×
3
5=
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6
$%&
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8
9×
3
8+
7
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3 12×
5
6+
1
2-( )13 815-715×57+715
3
29+
1( )13 ×29×13 75×4712-4712×51 56×5155
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19
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3
8×0.4=
9
4×
1
27=
1
2+
1
6=
2
3+
1
4=
5-57=
4
27×
9
16=
2
3×2.1=
3
5+
1
7=
3
4-
1
5=
8
9×
3
8=
4
5×
3
2=
3
7×0.7=
6×114=
9
10×
5
9=
6
7×
2
3=
6
7+
9
14=
2
5×2.5