三、看图填空。
以报社为观测点。
1. 商店在报社的(
2. 超市在报社的(
3. 书店在报社的(
4. 市场在报社的(
5. 医院在报社的(
以报社为观测点。
1. 商店在报社的(
西
)偏(北
)(45°
)方向(150
)m处。2. 超市在报社的(
东
)偏(北
)(30°
)方向(450
)m处。3. 书店在报社的(
东
)偏(南
)(40°
)方向(250
)m处。4. 市场在报社的(
南
)偏(西
)(10°
)方向(450
)m处。5. 医院在报社的(
西
)面(300
)m处。答案
1.西 北 45° 150
2.东 北 30° 450
3.东 南 40° 250
4.南 西 10° 450
5.西 300
2.东 北 30° 450
3.东 南 40° 250
4.南 西 10° 450
5.西 300
算一算
$\frac{3}{5} ÷ 3 =$
$\frac{5}{7} ÷ 5 =$
$\frac{2}{5} ÷ 6 =$
$\frac{3}{5} ÷ 6 =$
$\frac{5}{7} ÷ 6 =$
$\frac{2}{5} ÷ 8 =$
$\frac{3}{4} ÷ 9 =$
$\frac{5}{7} ÷ 7 =$
$\frac{2}{5} ÷ 2 =$
$\frac{3}{7} ÷ 3 =$
$\frac{3}{5} ÷ 3 =$
$\frac{5}{7} ÷ 5 =$
$\frac{2}{5} ÷ 6 =$
$\frac{3}{5} ÷ 6 =$
$\frac{5}{7} ÷ 6 =$
$\frac{2}{5} ÷ 8 =$
$\frac{3}{4} ÷ 9 =$
$\frac{5}{7} ÷ 7 =$
$\frac{2}{5} ÷ 2 =$
$\frac{3}{7} ÷ 3 =$
答案
$\frac{3}{5} ÷ 3 = \frac{3}{5} × \frac{1}{3} = \frac{1}{5}$
$\frac{5}{7} ÷ 5 = \frac{5}{7} × \frac{1}{5} = \frac{1}{7}$
$\frac{2}{5} ÷ 6 = \frac{2}{5} × \frac{1}{6} = \frac{1}{15}$
$\frac{3}{5} ÷ 6 = \frac{3}{5} × \frac{1}{6} = \frac{1}{10}$
$\frac{5}{7} ÷ 6 = \frac{5}{7} × \frac{1}{6} = \frac{5}{42}$
$\frac{2}{5} ÷ 8 = \frac{2}{5} × \frac{1}{8} = \frac{1}{20}$
$\frac{3}{4} ÷ 9 = \frac{3}{4} × \frac{1}{9} = \frac{1}{12}$
$\frac{5}{7} ÷ 7 = \frac{5}{7} × \frac{1}{7} = \frac{5}{49}$
$\frac{2}{5} ÷ 2 = \frac{2}{5} × \frac{1}{2} = \frac{1}{5}$
$\frac{3}{7} ÷ 3 = \frac{3}{7} × \frac{1}{3} = \frac{1}{7}$
$\frac{5}{7} ÷ 5 = \frac{5}{7} × \frac{1}{5} = \frac{1}{7}$
$\frac{2}{5} ÷ 6 = \frac{2}{5} × \frac{1}{6} = \frac{1}{15}$
$\frac{3}{5} ÷ 6 = \frac{3}{5} × \frac{1}{6} = \frac{1}{10}$
$\frac{5}{7} ÷ 6 = \frac{5}{7} × \frac{1}{6} = \frac{5}{42}$
$\frac{2}{5} ÷ 8 = \frac{2}{5} × \frac{1}{8} = \frac{1}{20}$
$\frac{3}{4} ÷ 9 = \frac{3}{4} × \frac{1}{9} = \frac{1}{12}$
$\frac{5}{7} ÷ 7 = \frac{5}{7} × \frac{1}{7} = \frac{5}{49}$
$\frac{2}{5} ÷ 2 = \frac{2}{5} × \frac{1}{2} = \frac{1}{5}$
$\frac{3}{7} ÷ 3 = \frac{3}{7} × \frac{1}{3} = \frac{1}{7}$
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