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1. 直接写出得数。(20☆)
$36.8÷0.4=$
$4.5×7=$
$18.2×2=$
$13÷0.01=$
$25.2÷0.2=$
$5.25÷25=$
$11.5×2=$
$7.2÷0.09=$
$1.3×0.06=$
$0.04×0.12=$
$1.75×8=$
$1.4×0.5=$
$30.8×5=$
$7.2×4=$
$4.86÷2=$
$90÷0.5=$
$6.4÷1.6=$
$6.15÷5=$
$3.52×0.04=$
$21×0.6=$
$81.9÷0.9=$
$3.15÷5=$
$0.06×0.04=$
$0.54÷0.3=$
$1.68÷60=$
$9÷0.05=$
$0.08÷5=$
$2.4÷24=$
$2.06×40=$
$15.7×3=$
$2.8÷20=$
$0.66÷0.3=$
$9÷0.15=$
$3.2×4=$
$4.9×5=$
$7.07÷7=$
$0.08×0.9=$
$56.14÷0.7=$
$6.69÷3=$
$0.125×8=$
$36.8÷0.4=$
92
$4.5×7=$
31.5
$18.2×2=$
36.4
$13÷0.01=$
1300
$25.2÷0.2=$
126
$5.25÷25=$
0.21
$11.5×2=$
23
$7.2÷0.09=$
80
$1.3×0.06=$
0.078
$0.04×0.12=$
0.0048
$1.75×8=$
14
$1.4×0.5=$
0.7
$30.8×5=$
154
$7.2×4=$
28.8
$4.86÷2=$
2.43
$90÷0.5=$
180
$6.4÷1.6=$
4
$6.15÷5=$
1.23
$3.52×0.04=$
0.1408
$21×0.6=$
12.6
$81.9÷0.9=$
91
$3.15÷5=$
0.63
$0.06×0.04=$
0.0024
$0.54÷0.3=$
1.8
$1.68÷60=$
0.028
$9÷0.05=$
180
$0.08÷5=$
0.016
$2.4÷24=$
0.1
$2.06×40=$
82.4
$15.7×3=$
47.1
$2.8÷20=$
0.14
$0.66÷0.3=$
2.2
$9÷0.15=$
60
$3.2×4=$
12.8
$4.9×5=$
24.5
$7.07÷7=$
1.01
$0.08×0.9=$
0.072
$56.14÷0.7=$
80.2
$6.69÷3=$
2.23
$0.125×8=$
1
答案
92 31.5 36.4 1300 126 0.21 23 80 0.078 0.0048 14 0.7 154 28.8 2.43 180 4 1.23 0.1408 12.6 91 0.63 0.0024 1.8 0.028 180 0.016 0.1 82.4 47.1 0.14 2.2 60 12.8 24.5 1.01 0.072 80.2 2.23 1
(1)如果$2a+3= 9$,那么$a^{2}+3= (
12
)$。答案
12
(2)$2x-a= 26$,如果$x= 18$,那么$a= $(
10
);如果$a= 18$,那么$x= $(22
)。答案
10 22
(3)如果规定$a※b= a+0.2b$,已知$6※x= 22$,则x的值为(
80
)。答案
80
3. 解方程。(18☆)
$3.5+5x= 43$
$8x+32= 64$
$7x-4.5= 30.5$
$2x-3.4= 9$
$3.4x+2.6x= 10.8$
$0.11x-0.4×1.2= 1.72$
用时:____分钟
共得:____☆/50☆
$3.5+5x= 43$
$ x = 7.9 $
$8x+32= 64$
$ x = 4 $
$7x-4.5= 30.5$
$ x = 5 $
$2x-3.4= 9$
$ x = 6.2 $
$3.4x+2.6x= 10.8$
$ x = 1.8 $
$0.11x-0.4×1.2= 1.72$
$ x = 20 $
用时:____分钟
共得:____☆/50☆
答案
$ x = 7.9 $ $ x = 4 $ $ x = 5 $ $ x = 6.2 $ $ x = 1.8 $ $ x = 20 $
