1, 10 ten is (), and there were () hundred in 2000.

2. The number of five thousand, two tens and three ones is ().

3, four thousand and ninety words (), eight thousand words ()

Three hundred and seven spelling (), two thousand five hundred is ().

Seen from the right, the number () is one hundred, and the number four is ().

5、 7002=( )+( ),8300=( )+( )

6. The minute hand points to 10, and the hour hand passes 2. At this time, it is () hours () minutes.

7. 1 = () minutes 180 seconds = () minutes.

8. Fill in? & gt？ ,? & lt？ Or? =? ：

2: 00: 200: 500 g: 5 kg: 78-49: 20+7

2500g○2kg 1:30○90:300+42○400+32

3080○2985 10, 102, 100, 1000-30○700

9.A number is 40 more than B number, B number is 20, and A number is ().

10, Xiaohong has 5 yuan's money, which is used to go to 3 yuan 2, and there is () left.

Second, the judgment:

1. Use the remainder to calculate the division, and the remainder must be less than the divisor. ( )

2、64? 48? 8 Calculate subtraction first, then division ()

3. Find a number that is 20 more than 72 and calculate it by addition ().

4. Find how much less 80 is than 100, and subtract it ().

5、5+4? 6 and (5+4)? The operation sequence of 6 is the same ()

6. From 8: 00 am to 2: 00 pm/kloc-0, with an interval of 4 hours ()

7. There are four more girls than boys, that is, four fewer boys than girls ()

8. One bag of salt weighs 500 grams, and two bags of salt are 1 kg ().

9. The largest three digits are 900 () more than the largest two digits.

10, the smallest four digits minus 1 is the largest three digits ().

Third, calculation:

7+2? 9 68-20? 4 130-70+30

300 1 257 4325

? 1943 + 128 ? 18 17

Fourth, the text problem:

1, subtract 46 from a number to get 98. What is this number? How much is 2.90 more than 120?

How much is 3.728 less than 1000? Subtract a number from 4350 to get 148. What's this number?

V. Application problems:

1. There are 39 ducks in the river, and there are 20 fewer geese than ducks. How many geese are there?

2. Give an average of 43 notebooks to 8 students. How much is each? How much is left?

Dig a 40-meter-long road, 26 meters have been dug, and it will be finished in two days. How many meters do you dig on average every day?

4. A catty of apples, 2 yuan, a catty of pears, 3 yuan. Mother bought 6 Jin of apples and 1 Jin of pears. A * * *, how much is it?