First, write the number directly. (16)
16÷4= 9×7= 64÷8= 87-9= 5×9= 63-9=
4×9= 65÷9= 50-8= 55÷9= 68-50= 7×8=
45+9= 42+7= 73+8 = 25+ 17=
Fill in the blanks. (16)
1, () 9777 () 635 () 40
2. Seven sixes are (), and forty has () fives.
The product of 3.8×7 is greater than the product of 8×6 ()
4. Adapting 6×4=24 into two division formulas is () and ().
5, 28÷5 The dividend is (), the divisor is (), the quotient is (), and the remainder is ().
6. In a division formula, the divisor and quotient are 7, the remainder is 3, and the dividend is ().
7, 45÷5= (), which means dividing () into () parts on average, and each part is ().
3. Choose three numbers from 63, 9, 8 and 7, and write two multiplication formulas and two division formulas. (4 points)
( )×( )=( ) ( ) ÷ ( )=( )
( )×( )=( ) ( ) ÷ ( )=( )
Fourth, the judgment question. (Mark "√" in () for the right and "×" for the wrong) (6 points)
What is four times 1 6? The formula is 6 × 4. ( )
2. Calculate 7 × 3 and 2 1÷3 with the same formula. ( )
3, 9 × 3 means 9 triple addition. ( )
4.()× 5 < 45 The maximum number of brackets can be 8. ( )
5. The square desktop has four corners. If one corner is sawed off, there are still three corners left. ( )
6. In a triangle, draw a line and add two right angles. ( )
5. Use vertical calculation. (6 points)
33 ÷ 6= 9 × 7= 20 ÷ 5=
17 + 64= 62 - 23= 73 ÷ 8=
6. Fill in the serial number of the correct answer to the following question in (). (2 points ×4=8 points)
Calculation of 1, 5 × 7 multiplication formula ()
① 7856 ② 5735 ③ 5525
How many times is 2.8 4? The formula is ()
①8 ÷ 4 ② 4 × 8 ③ 8 × 4
3. Xiaoming's family has collected 15 watermelons, (), how many baskets do you need?
① Three baskets were used. ② Each basket contains an average of 5. ③ Put 15 watermelons in a basket.
4, 36 ÷ 7 calculation result is ()
①5…… 1 ② 6…… 1 ③ 1……6
7. What can I fill in ()? (6 points)
8 ×( )