catalogue
Second grade mathematics volume 2 multiplication and division oral arithmetic problems
Mathematical multiplication and division formula table
Fast calculation formula of multiplication and division method
Mathematics in Grade Two Volume 2 Mathematical multiplication and division oral calculation questions 1.
Mathematical multiplication and division oral calculation problem 2
Mathematical multiplication and division oral calculation problem 3
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Mathematical multiplication and division formula table
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Quickly calculate the formula1by multiplication and division;
Formula: head joint, tail to tail, tail to tail.
For example: 12× 14=?
Solution: 1× 1= 1.
2+4=6
2×4=8
12× 14= 168
Note: Numbers are multiplied. If two digits are not enough, use 0 to occupy the space.
2. The heads are the same and the tails are complementary (the sum of the tails is equal to 10):
Formula: After a head is added with 1, the head is multiplied by the head and the tail is multiplied by the tail.
For example: 23×27=?
Solution: 2+ 1=3
2×3=6
3×7=2 1
23×27=62 1
Note: Numbers are multiplied. If two digits are not enough, use 0 to occupy the space.
3. The first multiplier is complementary and the other multiplier has the same number:
Formula: After a head is added with 1, the head is multiplied by the head and the tail is multiplied by the tail.
For example: 37×44=?
Solution: 3+ 1=4
4×4= 16
7×4=28
37×44= 1628
Note: Numbers are multiplied. If two digits are not enough, use 0 to occupy the space.
4, dozens of eleven times dozens of eleven:
Formula: head joint, head joint, tail to tail.
For example: 2 1×4 1=?
Answer: 2×4=8
2+4=6
1× 1= 1
2 1×4 1=86 1
5. Multiply 1 1 by any number:
Formula: head and tail do not move down, middle and pull down.
For example: 1 1×23 125=?
Answer: 2+3=5
3+ 1=4
1+2=3
2+5=7
2 and 5 are at the beginning and end respectively.
1 1×23 125=254375
Note: If you add up to ten, you will get one.
6, more than ten times of any number:
Formula: The first digit of the second multiplier does not drop, the single digit of the first factor multiplies each digit after the second factor, and then drops.
For example: 13×326=?
Solution: 13 bit is 3.
3×3+2= 1 1
3×2+6= 12
3×6= 18
13×326=4238
Note: If you add up to ten, you will get one.
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Articles related to mathematical multiplication, division and oral calculation in the second volume of the second grade;
★ Math multiplication, division and oral calculation problems in the second volume of Grade Two
★ Skilled practice method of mathematical multiplication formula in senior two.
★ People's Education Edition, Grade Two, Volume Two, Math Unit Review Questions
★ Examination questions for the final exam of mathematics in the first semester of senior two.
★ Review materials for the second volume of Grade 2 mathematics (2)
★ Final examination paper for the second semester of second grade mathematics.
★ Math learning methods in the second volume of the second grade of primary school
★ 273 math application problems and answers for second-grade pupils.
★ Mathematics Test Paper for Grade Two in Primary School
★ Review materials for the second volume of second grade mathematics.
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