19 out of 23 is greater than or equal to 95 out of 99

19 out of 23 is greater than or equal to 95 out of 99

less than

Who can tell me what division formulas are derived from 99 multiplication formula
It's better to use the division formula from 1 to 9. The more complete the formula is, the better. The master can give me these formulas, which are urgently needed by children in school,

1÷1=1 2÷2=1 3÷3=1 4÷4=1 5÷5=1 6÷6=1 7÷7=1 8÷8=1 9÷9=12÷1=2 4÷2=2 6÷3=2 8÷4=2 10÷5=2 12÷6=2 14÷7=2 16÷8=2 18÷9=23÷1=3 6÷2=3 9÷3=3 12÷4=3 15÷5=3 18÷6=3 21÷7=3 24÷8=3 27÷9=34÷...

What is the big 99 and small 99 of multiplication formula?

There is a kind of multiplication formula called small 99, and a kind of big 99. Small 99 is 36 sentences, big 99 is 81 sentences, small 99 2 has only two multiplication sentences, and it is necessary to memorize the multiplication formula of 2. Big 99 is 81 sentences, multiplication formula of 2 is nine sentences, and multiplication formula of 3 is nine sentences, so it is 9981 sentences. Our current textbook adopts big 99, but some improvements have been made in big 99, Teachers all know that in the past, the multiplication formula of "2" in "99" was "2:1 get 2", "2:2 get 4", "2:3 get 6". Putting "2" in the front was very difficult. Now we all put small numbers in the front. This time we use the multiplication formula. What's the advantage of it? We can recite the formula regardless of the multiplier and the multiplicator. 1 × 2 we can say "1:2 get 2", then "3 × 1", We can say one, three, three. It's more convenient. Of course, the teacher thinks it's inconvenient and wants to use the little nine. It's OK to memorize it in the way before. The textbook of Beijing Normal University uses the above method. In the new class, the students are instructed to make up their own pithy formula and write it in Chinese characters. The teachers may have found that the more they get to the back, the less they learn new pithy formula, When you learn the multiplication formula of 9, 2918 is already in the multiplication formula of 2, 3927 is already in the multiplication formula of 3, and the multiplication formula of 9 is only 9981, which is new. You can review other multiplication formulas