Grade 5 Unit 1 decimal multiplication integer pen arithmetic 40 questions.

One, fill in the blanks.

2. Expand 10 times is ( ) Expand 100 times is ( ) Expand 1000 times is ( ).

3. Shrinking 560 by 10 times is ( ) Shrinking 100 times is ( ) Shrinking 1000 times is ( ).

Second, calculation. 1. Write the number directly.

2. Calculate vertically.

Three, according to 13 3 = 39, quickly say the product of the following questions.

1, do not calculate, fill in ", then a 1

If b, "or=

7. The product of the true/false question (correct and wrong) is (the multiple of a number must be greater than this number.) (Keeping one decimal place is (a number multiplied by a decimal place, the product must be less than that number.) (

8. Select (fill in the correct answer in parentheses), move the decimal point of a decimal place to the right by 2 digits, and then move it to the left by 3 digits, this decimal ( ).

a, 10 times larger b, 10 times smaller c, 100 times larger d, 1000 times smaller.

5. The following formulas are less than ( ).

a, b, c, 9, write the number directly.

10. Columnar calculation.

11. Off-form calculation (simple calculation should be used if it can be simplified).

2. What is the number of times more than that.

3. The store brought in 14 baskets of apples, each basket kilogram, sold 400 kilograms, and how many kilograms were left.

4. Car A and car B drive out of each other from the two places at the same time, meet after 8 hours, car A travels 80 kilometers per hour, the speed of car B is times that of car A, how many kilometers are the distance between the two places.

Practice platform: 1. Select the appropriate conditions and draw in ( )."√"and then ask for questions.

Xiao Wang wants to make 1,000 pieces of machine parts.

The task was actually completed in 8 days.

Actually make 125 per day.

In fact, it was completed 2 days earlier than planned, and the original plan was to find out how many parts were made per day.

Intellectual surfing: A student walks at a speed of 50 meters per minute for 2 minutes from home to school, and if he continues to walk like this, he will be 8 minutes late for class; Later, he switched to a speed of 60 meters per minute, but arrived 5 minutes early, asking the student how far from home to school was.

Grade 4 oral arithmetic questions: multiplication of decimal numbers by whole ten and whole hundreds.

Nightshade 6) 20 =

13) Roll Nasan 50 =

Solution: Let the bee's flight speed be x

According to the question, x = A: This bee flies kilometers per hour.

I can't figure out the problem with a calculator.

Children should pay attention in class.

Decimal multiplication and division calculation problems.

5 57 (the easy way to circulate decimals, except for 2 decimal places):

Calculated vertically.

13027 retains two decimal places).

Retain three decimal places (commercial cyclic decimals).

Verify with multiplication) (check with division).

3. Off-form calculation (if it can be simplified, it should be simplified).