Those who read a 0 are: 3033300 (read 3033300), 3330300 (read 3300300), 3300330 (read 3300330), 330030 (read 330330).

Read two zeros: 3030330 (read 3030330), 3033003(3033003), 3033030(3033030).

Those who read three zeros are: 3030303 (read 3030303)

2. I don't understand the title: the quotient is 1 1 and the remainder is 7. Isn't their sum 18? Why is the sum of divisor quotient remainder of dividend 73? Maybe I don't understand and I can't answer.

There is no need to estimate these problems so simply. )

4. Let the original weight of each frame of apples be Xg.

Then X-7500=3/5(X+7500)

X=30000 (gram)

5. After setting a basket or adding 18kg to a basket of apples, the two frames of apples in B, A and B weigh X kg.

Then the apple with a border weighs 2/3 * X.

(2/3 *X- 18):X=8: 15

X=90 kg

So the result is that two boxes of apples A and B weigh 90- 18=72(kg).