The formula on the second floor is too advanced, and the formula on the first floor is moderately advanced.

Let me tell you something about this. Sophomore students should not use it too complicated.

Mother bought two kinds of moon cakes, one is 4 pieces per box, the other is 9 pieces per box, and the other is 30 pieces per box.

What does this mean? +? =30

One is 4 tablets per box and the other is 9 tablets per box.

It is concluded that 1 is a whole box, not a number 2. Multiply by 4)+ (? Multiply by 9)=30

The simple formula is 3 boxes times 4+2 boxes times 9 =30.

How many pieces are there in each kind of moon cake?

12 + 18

Title: This is wrong. How many pieces of each kind of moon cake are there? How many boxes of each kind of moon cake should be?

Three boxes of four and two boxes of nine.

In fact, this is the familiarity and application of practicing multiplication.

Parents of Beijing Gome Primary School came here to visit (* _ _ *) Hee hee. ...