3.84? 9.6+0.96? 6. Simple calculation of16

(38.4+6. 16)×0.96

=42.7776

Extended data:

There are six main methods for simple calculation:

1, "skillfully rounding up"-using the commutative law and associative law of addition for calculation.

2. Use the commutative law and associative law of multiplication for simple calculation.

3. Use the nature of subtraction for simple calculation, and pay attention to reverse calculation.

4, using the nature of division for simple calculation (divided by a number, multiplied by the reciprocal of a number, and then distributed).

5. Simple calculation by using the law of multiplication and distribution.

6. Mixed operation (according to the law of mixed operation).

The role of simple calculation:

1. Simple calculation enables students to work out the correct answer quickly and accurately in a short time.

2. Simple operation is different from elementary arithmetic. It does not operate according to the operation order of elementary arithmetic, but uses various operation properties and laws, which is a special operation mode.

3. There are many kinds of "simple operation" test questions, which can be generally divided into two categories: operation with "operation law" and operation with "operation nature".

4. Using simple calculation methods in mathematics can greatly save the time of doing problems.