1,先乘方,再乘除,最后加减:2,同级运算,从左到右进行;
3,如有括号,先做括号内的运算,按小括号、中括号、大括号依次进行。 1、
3、11?(?22)?3?(?11) 4、(?12)?(?)?15?(?1) 124114?(?)??(?)?(?) 2、(?81)?(?2.25)?(?)?16 23523931 例1:?32?[?32?(?23)2?2]
(1)12?[(?1)212?2)]
(3)[(?0.5)2?23]?(?62)
(1)—22—(—2)2—23+(—2)3
45 例2: 0?23?(?4)3?18 (2)[(?2)2?(?3)]?112 (4)|?514(?32|?7)3?314 2)、?62?(?11)2?(?3)2?(?11)322?(?3)
(
(3)?(?1)19971114?(1?0.5)??(?) (4)(?1)3?(?8)??(?3)3?[(?2)5?5]
312
(5)-10 + 8÷(-2 )2 -(-4 )×(-3 )
(7)-14 + ( 1-0.5 )×13×[2×(-3)2]
(9)5?(?6)?(?4)2?(?8) (11)(712?56?34)?(?12)?6
(13)(?1)2?122?(23?23?2)
(15) 6-(-12)÷(?2)2 2176)-49 + 2×(-3 )2 + (-6 )÷(-19) (8)(-2)2-2×[(-1312)2-3×4]÷5. (10)(?3)2?(?243?1)?0 (12)(?5)?(?4)2?0.25?(?5)?(?4)28 (14)?42??(?7)?6???(?5)3?3??(?2)31(16)(-48)÷ 8 -(-5)÷(?22)
(
123(17) 42×(?)?(?)÷ 0.25 (18)(?81)???3?2
34
(19) ?2???3?2???3?3?3
(21) ??0.25?(?5)?4?(?125) 920)(-5)×6+(-125) ÷(-5)
3
22)?12?(2?1)?1?(?3)2326 ((