1, oral calculation. (16)

32÷8= 4×7= 10000-6000= 8×5=

45÷9= 35÷7= 880-80= 7×9=

42+6= 40÷8= 800+200= 27÷9=

54-6= 72÷9= 20÷4= 9×4=

2. Use vertical calculation. (8 points)

50÷6= 32÷7= 8×7= 63÷9=

3. calculation. (7 points)

8m+ 1m = () m = () decimeter.

700 cm +300 cm = () cm = () decimeter = () meter

50 decimeter+16 decimeter = () decimeter = () centimeter.

Fill in the blanks. (28 points)

1, write the length of the following object.

() mm () mm

2. 1 decimeter = () cm 40 decimeter = () m

3 cm = () mm 20 cm = () mm

60mm = () cm 1 m = () cm.

3. Fill in the appropriate length unit in the brackets.

The index finger is about 10 () the teacup is about 1 () a book is about 10 ()

A towel is about 5 () long, and a desk is about 80() 1 coin, about 1 () thick.

4. Fill in ">" in ○. "<" or "=".

60 decimeters, 6 meters, 7 centimeters and 70 decimeters.

5 cm 0.5 decimeter 60 mm 0.6 decimeter

9mm 07mm 1 m 090cm

10 cm 09 decimeter 5 cm 09 decimeter

5. The length of the lower line segment is () cm () mm, which is () mm. ..

6. Line up the following quantities from long to short.

3 meters, 30 centimeters, 32 decimeters and 290 millimeters

Third, judge the question. (8 points)

1, 1 m = 10 decimeter = 100 cm = 1000 mm. ()

This needle is 3 meters long. ( )

3. Toothbrush length 15mm. ( )

A skipping rope is 20 minutes long. ( )

The thickness of a bank card is about1mm. ( )

6. 3 cm shorter than 1 decimeter is 70 mm. ()

7. An ant is about 3 meters long. ( )

8. Mom's height 163 decimeter. ( )

Fourth, draw line segments as required. (8 points)

1. Draw a line segment with a length of 40mm.

2. Draw a line 4 cm shorter than 1 decimeter.

3. Draw a line 3 mm longer than 5 cm.

Fifth, solve the problem. (25 points)

1, Xiaolin is 300 meters from home to school, and the electricity is 200 meters.

(1) How many meters does Kobayashi walk to and from school every day? (3 points)

(2) How many meters does Kobayashi walk from school to the cinema? (3 points)

2. A pencil took 4 cm, leaving 16 cm. How long is this pencil? (3 points)

3. Two lines are * * * long 10 decimeter, and the first one is 8 decimeter long.

(1) How long is the second root? (3 points)

(2) What is the difference between two wires? (3 points)

A ribbon is 5 meters long and is cut into sections every 6 minutes. How many sections can you cut and how many decimeters are left? (5 points)

5. Each skipping rope is 2 meters long. Is it enough to cut 15 meter long rope into 8 skipping ropes? (5 points)