1, unit price × quantity = total price

2. Single output × quantity = total output

3. Speed × time = distance

4. Work efficiency x time = total workload.

5. Appendix+Appendix = Total

6, one addend = and-the other addend.

7. Negative-negative = difference

8. Negative = negative difference

9. Negative = negative+difference

10, factor × factor = product

1 1, one factor = product ÷ another factor.

12, dividend = quotient

13, divisor = dividend quotient

14, dividend = quotient × divisor

15. Division with remainder: dividend = quotient × divisor+remainder.

A number is divided by two consecutive numbers. You can multiply the last two numbers first, and then divide this number by their product, and the result is still the same. For example: 90 ÷ 5 ÷ 6 = 90 ÷ (5× 6)

1 km = 1 km

1 km =1000m

1 m = 10 decimeter

1 decimeter =10cm

1 cm =10mm

1 m2 = 100 square decimeter

1 square decimeter = 100 square centimeter

Multiplication formula nursery rhymes

A frog has a mouth, two eyes and four legs.

Two frogs have two mouths, four eyes and eight legs.

Three frogs have three mouths, six eyes and twelve legs.

Four frogs with four mouths jumped into the water.

Children's songs of the year, month and day

135780 wax (65438+February).

Thirty-one days is never bad.

The winter in 469 (165438+ October) was thirty.

February is special and unforgettable.

February 28th, normal year.

Add one in February of leap year.

Children's songs about knowing time

When the hand passes the number, it will show the time.

If you want to ask how many points you got, please look at the minute hand carefully.

Hour hand and minute hand

The small dial goes round and round, and the hour hand goes round and round.

The minute hand is long, the hour hand is short, one is fast and the other is slow.

The minute hand ran a full circle, and the hour hand only ran a short one.

A nursery rhyme that counts by dividing several numbers.

Looking at the highest dividend, a high bonus is not enough.

Quotient is written in a place other than dividend.

If the quotient is less than 1, write 0 to calculate the first and last digits of the quotient.

The remainder should be less than the divisor, so that the operation is correct.

Decimal addition and subtraction nursery rhymes

Calculate decimal addition and subtraction, and align the keys with decimal points.

You can add and subtract by filling the last number with 0.

Elementary arithmetic nursery rhymes

Browse the whole project to see if it can be simple.

From left to right, multiply first, then divide, then add and subtract.

Parentheses are small, medium and large, first inside and then outside.

The key to horizontal calculation and vertical measurement is to check step by step.

Solve the application problem of children's songs

Read the topic several times and find the key.

Look at what you want first, and then find the conditions.

Make a reasonable formula and calculate it carefully.

Ask for a solution to the problem, and don't forget it.

Check the results and finally write the answer.