登录
1.直接写出得数。
$5-2.7=$
$8.6×5=$
$16-0.125=$
$280÷100=$
$0.26×0.5=$
$198.01×0.1=$
$0.7×1.2=$
$\frac{8}{11}+\frac{2}{11}=$
$\frac{9}{15}-\frac{7}{15}=$
$4.01×7=$
$0.96×0.2=$
$45×0.4=$
$0.9×10×0.1=$
$0.04×90=$
$2.3×3.6÷2.3×3.6=$
$5-2.7=$
$8.6×5=$
$16-0.125=$
$280÷100=$
$0.26×0.5=$
$198.01×0.1=$
$0.7×1.2=$
$\frac{8}{11}+\frac{2}{11}=$
$\frac{9}{15}-\frac{7}{15}=$
$4.01×7=$
$0.96×0.2=$
$45×0.4=$
$0.9×10×0.1=$
$0.04×90=$
$2.3×3.6÷2.3×3.6=$
答案
1. 2.3 43 15.875 2.8 0.13 19.801 0.84 $\frac{10}{11}$ $\frac{2}{15}$ 28.07 0.192 18 0.9 3.6 12.96
2. 找规律填数。
(1)5.5,6,6.5,(
(2)14.99,14.49,13.99,(
(3)80,40,(
(4)3.2,6.4,(
(1)5.5,6,6.5,(
7
),(7.5
)。(2)14.99,14.49,13.99,(
13.49
),(12.99
)。(3)80,40,(
20
),10,(5
)。(4)3.2,6.4,(
12.8
),(25.6
),51.2,(102.4
)。答案
2. (1)7 7.5 (2)13.49 12.99 (3)20 5 (4)12.8 25.6 102.4
3. 给下面算式等号左边的数加上小数点，使算式成立。
288－8＝20.8
35×26＝9.1
56＋126＝18.2
209×45＝94.05
288－8＝20.8
35×26＝9.1
56＋126＝18.2
209×45＝94.05
答案
3. 28.8－8＝20.8
3.5×2.6＝9.1
5.6＋12.6＝18.2
20.9×4.5＝94.05(答案不唯一)
3.5×2.6＝9.1
5.6＋12.6＝18.2
20.9×4.5＝94.05(答案不唯一)
4. 计算下列各角的度数。
∠C=
∠B=∠C=
∠C=
∠C=
40°
∠B=∠C=
30°
∠C=
20°
答案
4. 40° 30° 20°
