First, circle first, then fill in the blanks.

1.5, 1; 5, 1

2.3, 1; 3, 1

3.4,3,3; 4, 3, 3 (the answer is not unique)

Second, look at the picture and fill in the formula.

3,2; 5,2

Third, connect with wires.

Slightly,

Fourth, use vertical calculation.

7……2,8……2,7……4,6……3,7,6……4

5. Think about it and fill it in.

1.7,8

Six,

19 ÷ 4 = ... 3, 23 ÷ 5 = 4 ... 3, 27 ÷ 6 = 4 ... 3 (the answer is not unique).

Seven, solve the problem.

1.20,8,2,4; 2.40,6,6,4; 3.25,3,8 copies, 1 copy; 4.30, 4, 7, 2; Up to 7 vehicles can be installed; 5.15,3,5 boxes; 1 5,7,2 boxes,1yuan;

You can buy up to 2 boxes.