① 直接写出得数。(每题1分,共20分)
$9+1.5=$
$67×0.8=$
$476-162=$
$6.13×0=$
$9.5-8.3=$
$236.8-57.6=$
$89×0.01=$
$4.3-2.6=$
$72+21.8=$
$0.8×0.125=$
$0.6-0.15=$
$6.5-4.9=$
$9.96-3.28=$
$72.3-35.5=$
$0.26÷0.13=$
$3.98-1.27=$
$17-8.2=$
$0.01÷0.1=$
$0.32×5=$
$75+9.8=$
$9+1.5=$
$67×0.8=$
$476-162=$
$6.13×0=$
$9.5-8.3=$
$236.8-57.6=$
$89×0.01=$
$4.3-2.6=$
$72+21.8=$
$0.8×0.125=$
$0.6-0.15=$
$6.5-4.9=$
$9.96-3.28=$
$72.3-35.5=$
$0.26÷0.13=$
$3.98-1.27=$
$17-8.2=$
$0.01÷0.1=$
$0.32×5=$
$75+9.8=$
答案
1. 10.5 53.6 314 0
1.2 179.2 0.89 1.7
93.8 0.1 0.45 1.6
6.68 36.8 2 2.71
8.8 0.1 1.6 84.8
1.2 179.2 0.89 1.7
93.8 0.1 0.45 1.6
6.68 36.8 2 2.71
8.8 0.1 1.6 84.8
② 列竖式计算,带※的得数保留两位小数。(每题3分,共9分)
6.3×0.28 =
1.62÷1.5 =
※69.34÷18.37≈
6.3×0.28 =
1.62÷1.5 =
※69.34÷18.37≈
答案
2. 竖式略
1.764 1.08 3.77
1.764 1.08 3.77
③ 计算。(每题3分,共9分)
$0.7×5.2+8.3×5.2+5.2$
$16×3.5×1.25$
$7.62×0.8+0.2×7.62$
$0.7×5.2+8.3×5.2+5.2$
$16×3.5×1.25$
$7.62×0.8+0.2×7.62$
答案
3. 52 70 7.62
④ 解方程。(每题4分,共12分)
$3.2x - 4.8 = 2.4$
$18 + 7x = 39$
$15x + 3.8 × 12 = 87.6$
$3.2x - 4.8 = 2.4$
$18 + 7x = 39$
$15x + 3.8 × 12 = 87.6$
答案
4. 解:$x=2.25$ 解:$x=3$ 解:$x=2.8$
登录