① 直接写出得数。(每题1分,共20分)
6.36-2.6=
0.05+0.95=
36.5+42.1=
68+92.5=
7.98-3.51=
0÷4.61=
4.68-3.29=
2.3×20=
0.8×0.5=
19-14.7=
56+32.5=
8.3+1.7=
29.8+37.6=
8.4+6=
31.8+46.9=
0.25×4×1.2=
0.45÷0.15=
2.7+1.2=
0.4×0.5=
8.8÷2.2=
6.36-2.6=
0.05+0.95=
36.5+42.1=
68+92.5=
7.98-3.51=
0÷4.61=
4.68-3.29=
2.3×20=
0.8×0.5=
19-14.7=
56+32.5=
8.3+1.7=
29.8+37.6=
8.4+6=
31.8+46.9=
0.25×4×1.2=
0.45÷0.15=
2.7+1.2=
0.4×0.5=
8.8÷2.2=
答案
3.76 1 78.6 160.5
4.47 0 1.39 46
0.4 4.3 88.5 10
67.4 14.4 78.7 1.2
3 3.9 0.2 4
4.47 0 1.39 46
0.4 4.3 88.5 10
67.4 14.4 78.7 1.2
3 3.9 0.2 4
② 列竖式计算,带※的得数保留一位小数。(每题3分,共9分)
2.6×1.08 =
4.8÷0.75 =
※5.9×3.14≈
2.6×1.08 =
4.8÷0.75 =
※5.9×3.14≈
答案
竖式略
2.808 6.4 18.5
2.808 6.4 18.5
③ 计算。(每题3分,共9分)
$3.8+4.29+2.1+4.2$ $4.37×5.1-0.49×3.6+4.73×4.9$ $(1275+1275)×0.5$
$3.8+4.29+2.1+4.2$ $4.37×5.1-0.49×3.6+4.73×4.9$ $(1275+1275)×0.5$
答案
14.39 43.7 1275
④ 解方程。(每题4分,共12分)
$45÷ x=0.9$
$2x÷ 6=2.4$
$3(x-1.8)=24.6$
$45÷ x=0.9$
$2x÷ 6=2.4$
$3(x-1.8)=24.6$
答案
解:$x=50$ 解:$x=7.2$ 解:$x=10$
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