1, 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.
2, a number divided by several children's songs
Look at the highest dividend first, which is not high enough; Write the quotient anywhere except the dividend, and the quotient is less than 1 write 0. In quotient, the first and last digits, the remainder is less than the divisor, so the operation is correct.
3, decimal addition and subtraction nursery rhymes
Calculate decimal addition and subtraction, align decimal points, and add and subtract the last digit with 0.
Decimal size comparison nursery rhymes
Decimal size is relatively easy. Put them all on first, the decimal point and the number of digits should be matched, and then compare them. Compare the highest bit first, and the ratio of the highest bit to the low bit is the same. Finally, it is divided into high and low, which is higher and which is bigger. Division is decimal division. Division is a decimal. Remember the transformation. Move the decimal point to make it an integer, move the divisor a few places, and the dividend will be the same. If the number of digits is not enough, add 0 to make up the position.
4, elementary arithmetic nursery rhymes
Look at the whole project and see if it can be simple; Take the formula from left to right, multiply first, divide then add and subtract; Parentheses are small, medium and large, with the number inside first and then outside; The key to horizontal calculation and vertical measurement is to check step by step.
5. Solve the application of children's songs
Look at the topic several times to find the key points; Look at what you want first, and then find conditions; Reasonable calculation formula, careful calculation; Ask for more answers to a question, and the unit will not forget it; Check the results and finally write the answer. Understanding of length, area, volume and volume; One line is long and has a large area; Volume takes up space and volume counts.
Step 6 finish children's songs
The rounding method is good, and the approximate figure can be found out by law; Take which one to look at the next one, and then compare it with five words; It is 5 big 5 forward 1, and all less than 5 are discarded. The equal sign is replaced by an equal sign, which makes people understand at a glance.
7. Solving the problem of chickens and rabbits in the same cage.
A chicken has two feet, and a rabbit has four. Count your head and body first. Then press the chicken apart.
8, operating songs
Playing bamboo board, Lian Tian, students listen to me. I don't want to talk about other tables and four operations today. Clear order is the key to calculating mixed test questions. The operation at the same level is the best, counting from left to right. There are two levels of operations, first multiplication and division, then addition and subtraction. What should I do if I encounter parentheses? Count the parentheses first, then the parentheses. The order must not be out of order. Every step has been tested, both correct and happy.