(1) The sum of 5.63 and 2.7 is (

)。

(2)6.42 is greater than 5.8 (

)。

(3) The subtraction is 3. 1, the difference is 2.08 and the minuend is (

)。

(4) The number 1.04 less than 3.4 is (

)。

2. Calculate the following questions continuously.

What is the sum of (1)3.42 and 13.6?

(2) The difference is 15.03, and the minuend is 2 1.2. What is a minuet?

(3) What is the number of1.94 less than 2.802?

(4) The sum of two numbers is 58.7, one number is 18.42, and what is the other number?

3. Calculate in two ways.

(1) A number is 1.43 less than 2.57. What's this number?

(2)3.8 is 0.98 more than a number. What's this number?

(3) The difference between 5.04 and a number is 2.7. What's this number?

4. Fill in the blanks. (oral calculation)

(1)2.85 plus 3.2, minus 4.8, the result is (

)。

(2) Subtract 2.6 from 7.2 and add 2.8, and the result is (

)。

(3) The sum of 6.4 and 3.65 is greater than 7.05 (

)。

(4) The difference between15.42 and 5.4, minus 6, gets (

)。

5. Column comprehensive formula calculation.

(1)24.2 minus 7.28 minus 3.22. What is the result?