Math homework for the second grade of the first primary school
First, fill in. 1. If a graph is folded in half along a straight line, the graphs on both sides can completely overlap. Such a graph is called a () graph, and this straight line is ().
2. Rectangular has () axis of symmetry, and square has () axis of symmetry.
Xiaoming walked 3 meters ahead, which is a phenomenon.
4, when the car is driving on a straight road, the movement of the body is () phenomenon.
5, the elevator rise is () phenomenon.
6, waterwheel pumping is () phenomenon.
It took () minutes for the minute hand to turn from 6 to 9.
Second, judge.
1. The movement of the drawer when it is opened is a translation phenomenon. ()
Uncle Zhang is driving on a straight road, and the movement of the steering wheel is a rotating phenomenon. ()
3. The movement of the hour hand and the minute hand on the clock face is a rotating phenomenon. ()
The launch of rocket is a rotating phenomenon. ()
5, the fruit on the tree fell to the ground, is a kind of translation phenomenon ()
6. The rotation of fan blades in electric fans is a translation phenomenon. ()
Third, choose.
1, the switch of the classroom door, the movement of the door is a () phenomenon.
A, translation b, rotation c, translation and rotation
2. The following movement () is translation.
A, rotating hula hoop b, fan blade c, dial the ball
3. Fold a rectangular piece of paper in half, then fold it in half, draw half of the desk lamp along the straight line where the crease is located, and then cut it along the edge line to cut out () complete desk lamps.
a、 1 B、2 C、4
4. Fold a rectangular piece of paper in half for three times, draw half of the butterfly along the straight line where the crease is located, cut it along the edge line, and cut out () a complete butterfly.
a、 1 B、2 C、4
5. The movement below () is rotation.
Math homework for the second grade in the second primary school
Fill in the blanks. 1. Every two people shake hands, three people can shake hands () times and four people can shake hands () times.
2. There are three numbers, 4, 5 and 6, which can form a two-digit number (). They are ().
3. Change 7+7+7+7 into the multiplication formula ().
4. Four 9s are (), the addition formula is (), the multiplication formula is (), pronounced as (), and the formula is ().
5. () Zhang 2 yuan and () Zhang 1 yuan add up to 5 yuan.
6. There are () days in one week and () days in five weeks.
7, 7 () is 42, () is 45.
8. Write two multiplication formulas with formula 5735: () and ().
9. How much can I put in ()?
6×()