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① 直接写出得数。(每题1分,共20分)
91+68.5=
0.72÷0.18=
1.5+0.25=
34×0.5=
297-158=
18×0.01=
15-7.8=
15-6.3=
4.5-3.8=
2.5-2.5÷5=
234-77=
0.9÷0.3=
9.08×0+9=
8.8×0.3=
5.6×3=
3.2-0.1=
6.3+0.37=
3.2+5=
3.6÷0.4=
0.333×0.2=
91+68.5=
0.72÷0.18=
1.5+0.25=
34×0.5=
297-158=
18×0.01=
15-7.8=
15-6.3=
4.5-3.8=
2.5-2.5÷5=
234-77=
0.9÷0.3=
9.08×0+9=
8.8×0.3=
5.6×3=
3.2-0.1=
6.3+0.37=
3.2+5=
3.6÷0.4=
0.333×0.2=
答案
1. 91+68.5=159.5
0.72÷0.18=4
1.5+0.25=1.75
34×0.5=17
297-158=139
18×0.01=0.18
15-7.8=7.2
15-6.3=8.7
4.5-3.8=0.7
2.5-2.5÷5=2
234-77=157
0.9÷0.3=3
9.08×0+9=9
8.8×0.3=2.64
5.6×3=16.8
3.2-0.1=3.1
6.3+0.37=6.67
3.2+5=8.2
3.6÷0.4=9
0.333×0.2=0.0666
0.72÷0.18=4
1.5+0.25=1.75
34×0.5=17
297-158=139
18×0.01=0.18
15-7.8=7.2
15-6.3=8.7
4.5-3.8=0.7
2.5-2.5÷5=2
234-77=157
0.9÷0.3=3
9.08×0+9=9
8.8×0.3=2.64
5.6×3=16.8
3.2-0.1=3.1
6.3+0.37=6.67
3.2+5=8.2
3.6÷0.4=9
0.333×0.2=0.0666
② 列竖式计算,带※的得数保留两位小数。(每题3分,共9分)
$19.48×25.61=$
$7.82÷3.4=$
$※53.5÷0.85≈$
$19.48×25.61=$
$7.82÷3.4=$
$※53.5÷0.85≈$
答案
2. 竖式略
19.48×25.61=498.8828
7.82÷3.4=2.3
※53.5÷0.85≈62.94
19.48×25.61=498.8828
7.82÷3.4=2.3
※53.5÷0.85≈62.94
③ 计算。(每题3分,共9分)
$99×2.6$
$9.24-6.3+0.76-2.7$
$52.6×0.83+0.17×52.6$
$99×2.6$
$9.24-6.3+0.76-2.7$
$52.6×0.83+0.17×52.6$
答案
3. 99×2.6=257.4
9.24-6.3+0.76-2.7=1
52.6×0.83+0.17×52.6=52.6
9.24-6.3+0.76-2.7=1
52.6×0.83+0.17×52.6=52.6
④ 解方程。(每题4分,共12分)
$5x-2.5=5$
$6×7+3x=69$
$54-18+3x=72$
$5x-2.5=5$
$6×7+3x=69$
$54-18+3x=72$
答案
4. 解:$x=1.5$
解:$x=9$
解:$x=12$
解:$x=9$
解:$x=12$
