fill (up) a vacancy
1, viewed from the () end, the first position is position A, and the second position is position ().
2. A number with 2 digits and 1 digit is ().
A tens of digits is 2, a digit is 1, and this number is ().
3, 1 10 and 5 ones ().
20 is made up of () ten.
4. 16 has () tens and () ones;
19 contains 1 () and 9 ().
Six out of six ().
5. The first number of18 is (), and the last number is ().
6. The two numbers adjacent to 10 are () and ().
7. Please write the first four digits of 16: ().
8. One addend is 6, the other is 7, and the sum is ().
The minuend is 17, the minuend is 4 and the difference is ().
9. The number 6 greater than 8 is (), and the number 6 less than 8 is ().
10, greater than 7, and the number less than 13 is: ().
1 1、9( )> 14 10-( )>5
12, please arrange the following formulas in descending order.
7+7 10-3 13+5 1 1+220- 10 14-5
13, in the numbers 8,20, 1,17,4, 13,
(1) A * * * has multiple ().
(2) The fourth number from the left is (), and the second number from the right is ().
(3) Please circle the third number from the left.
1 3 4 5 2 3 4 3 5
14. How many ways can you fill in the following questions?
5 5 5
5 5 5
Second, multiple-choice questions:
1, the number 5 greater than 9 is
4 14 15
2. The formula of the number equal to 12-3 is:
12+3 13-2 2+7
3. A number consisting of 1 tens and 7 ones. This number is
8 17 7 1
4, ○ ○ ○ ●●● The correct formula is
9-2+4= 1 1 7+2+4= 13 7+4= 1 1
5, 14 contains
1 10 and 4 ones 1 1 and 4 tens140 tens.
6. One digit is
10 9 1
7. 1 1 How much more than 6? The correct expression is
6+5= 1 1 1 1-6=5 1 1-5=6
8, the following graphics, different from other classes are
Third, write the formula whose sum is 14.
( )+( )= 14 ( )+( )= 14 ( )+( )= 14 ( )+( )= 14
( )+( )= 14 ( )+( )= 14 ( )+( )= 14 ( )+( )= 14
( )+( )= 14 ( )+( )= 14 ( )+( )= 14 ( )+( )= 14
( )+( )= 14 ( )+( )= 14 ( )+( )= 14
Reference answer:
One,
1: Yes, ten;
2: 12;
3: 15,2;
4: 1,6, 10, 1, 1;
5: 17, 19;
6:9, 1 1;
7: 15, 14, 13, 12;
8: 13, 13;
9: 14,2;
10:8,9, 10, 1 1, 12;
1 1: 12,7, 19,4;
12: 10-3 14-5 20- 10 1 1+2 7+7 13+5;
13:6, 17,4,4;
14:5+5 >55-5 & lt； 5 55-5;
Second,
1: 14;
2:2+7;
3: 17;
4:7+2+4= 13;
5: 1 tens and 4 ones;
6:9;
7: 1 1-6=5;
Third,
(0)+( 14)= 14 ( 1)+( 13)= 14 (2)+( 12)= 14 (3)+( 1 1)= 14
(4)+( 10)= 14 (5)+(9)= 14 (6)+(8)= 14 (7)+(7)= 14
(8)+(6)= 14 (9)+(5)= 14 ( 10)+(5)= 14 ( 1 1)+(4)= 14
( 12)+(2)= 14 ( 13)+( 1)= 14 ( 14)+(0)= 14