登录
$4.2 + 9.1 =$
$480 ÷ 16 =$
$40 × 45 =$
$2.9 + 9.1 =$
$125 ÷ 25 =$
$68 × 20 =$
$105 ÷ 3 =$
$108 × 5 =$
$24 × 5 =$
$1.87 + 5.3 =$
$42 × 30 =$
$440 ÷ 11 =$
$6.68 - 1.5 =$
$427 ÷ 7 =$
$9.1 - 3.2 =$
$35 × 20 =$
$500 × 16 =$
$0.81 - 0.5 =$
$12.6 + 7.08 =$
$4.3 - 0.25 =$
$480 ÷ 16 =$
$40 × 45 =$
$2.9 + 9.1 =$
$125 ÷ 25 =$
$68 × 20 =$
$105 ÷ 3 =$
$108 × 5 =$
$24 × 5 =$
$1.87 + 5.3 =$
$42 × 30 =$
$440 ÷ 11 =$
$6.68 - 1.5 =$
$427 ÷ 7 =$
$9.1 - 3.2 =$
$35 × 20 =$
$500 × 16 =$
$0.81 - 0.5 =$
$12.6 + 7.08 =$
$4.3 - 0.25 =$
答案
1. 13.3 30 1800 12 5 1360 35 540 120 7.17 1260 40 5.18 61 5.9 700 8000 0.31 19.68 4.05
288×51=
506×16=
☆25−0.35=
506×16=
☆25−0.35=
答案
2. 14688 8096 24.65
（竖式及验算略）
（竖式及验算略）
3 图形计算（计算下面各平行四边形的面积）
建议用时3分钟 评价：☆☆☆
(1)
(2)
(3)
建议用时3分钟 评价：☆☆☆
(1)
(2)
(3)
答案
3. (1) 63×25=1575(m²)
(2) 26×12=312(dm²)
(3) 30×16=480(cm²)
[或 20×24=480(cm²)]
(2) 26×12=312(dm²)
(3) 30×16=480(cm²)
[或 20×24=480(cm²)]
计算下面平行四边形的面积。
答案
4. (80−16×2)÷2=24(cm)
24×12=288(cm²)
24×12=288(cm²)
