| 摘要 |
PROBLEM TO BE SOLVED: To provide a calculator capable of successively displaying or redisplaying a halfway expression by an easily understandable operation without requiring a special halfway result memory, and without making a complicated halfway result calculation. SOLUTION: '10×2+4×3' is taken out by processing in S1402. After executing processing of S1403 and S1404 in this taken-out expression part, a result of a calculation part is inputted to an original expression part (S1405), and next, '=' is added to a numeric expression memory, and this expression part is inputted (stored) (S1406). By processing in this S1406, the numeric expression memory becomes a state of storing a series of expression '(5+5)×2+(2+2)×3=10×2+4×3=20+12' by adding an '='-added expression part '20+12' to '(5+5)×2+(2+2)×3=10×2+4×3'. A halfway expression is displayed in S1409, and thus, '=20+12' is displayed on a display part.
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