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Fast calculation method of second grade mathematics
Example of clever calculation in senior two mathematics 32+44+38

Thinking of solving problems: Four arithmetic rules (calculation in sequence, first multiplication and division, then addition and subtraction, first parenthesis, first power), that is, disjoint operation (recursive equation calculation), should be carried out on the premise of this principle.

Problem solving process:

32+44+38

=32+38+44

=70+44

= 1 14

Extended data \ vertical calculation-calculation result: align two addend numbers, and then add the numbers in the same counting unit separately. When the addition result exceeds 10, 1 will be added to the high position, and the high position addition needs to accumulate the result of 1 to the low position.

Problem solving process:

Step 1: 0+4=4

Step 2: 7+4= 1 to the high position, 1.

According to the above calculation steps, the comprehensive calculation result is 1 14.

If in doubt, please ask questions. If satisfied, please adopt them.