First, fill in.
1, the smallest two digits is (), its sum with a digit is (), the difference is (), and the product is ().
2、 1×2×3×4×5×6×7×8×9×0=()。
There are () zeros at the end of the product of 3.250×8; There are () zeros at the end of the product of 304×5.
4. In the formula 42× 5 = 2 10, 42 is (), 5 is (), and 2 10 is ().
5, 6 times 7, ten is () and ten is ().
6. Multiply () with any number to get 0, and add () with any number to get any number.
Four times of 7 and 25 is (), and five times of 24 is ().
8. According to 33× 5 = 165, write the numbers of the following formula directly.
330×5=()。
3300×5=()。
9. A telephone number is 8 16 yuan, and a * * * is about () yuan.
Second, the eyes are golden. (Draw "√" on the right and "×" on the wrong)
1, the sum of 0 plus a number not equal to 0 must be greater than the product of 0 and this number. ()
2. The product of □ 2× 9 must be three digits. ()
The sum of five identical numbers is equal to five times this number. ()
4、 12×0= 12。 ()
Third, sit in the right position.
1、△+△+△+△=36,△=()。
a、 12、B、9、C、4 .
2. The product of the multiplication of two numbers must be the sum of the two numbers ().
A, greater than b, less than c, equal to d, uncertain.
3. Estimate 1□8×7. To make its product closest to 1400, fill () in □.
a、7、B、8、C、9D、0、E、4 .
4, 5×40 and 4×50 results ().
A, the same, B, different, C, 4×50 results are big, and D, 5×40 results are big.
Fourth, solve the problem.
1. The discounted ticket price from Guangzhou to Beijing is 989 yuan. How much does it cost to buy eight such tickets? Is it enough for Xiao Ming to bring 9000 yuan?
Lili goes to school by bike every day. She rode180m every minute on average, which took 8 minutes. How far is Lili's home from school?
407 people visit People's Park every day. According to this calculation, how many people come to visit in a week?
4. A Siberian tiger weighs 2 15 kg, and a bison weighs 38 kg, which is less than three times that of the Siberian tiger. How much does this bison weigh?