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(1) (+)×3 ×9 (2)(— )×
(3) ×(7 — ) (4) ×+ ×
(5) ×+× (6) ×- ×
(7) ×6 - × 6 (8)+×+×
(9) 37× (10) × 24
(11) ×+ ×- (12)×101-
(13) ×—× (14) × 99 +
(15) ( + )×7 ×9 (16)3×25
(17) 36× (18) ( - )×
(19)26× (20)32×
(21) (22)
(23) (24)
(25) (26)
(27)- ×- × (28)
(29) ÷+÷ (30)×(15×)
(31) ×× (32)25×4
(33)54×(— ) (34)
(35) (36)
(37) (38)
(39) (40)
(41) (42)
(43)
(44) 6.8×+×3。2 (45) 101×
(46) +×15 (47)8÷8
(48) ×+× (49)( 90+)×
(50)×+×
(51)×+÷ (52)18×(+)
(53)×7+×5 (54)(-)×(24-)
(55)(×+)÷ (56)÷[(+)×]
(57) ×+× (58)×3
(59) (60)
(61) (32×+17)÷ (62)(25+)÷+
(63) ×+×+
(64) (65)
(66) (21×+×21)× (67)(99+)÷9
(68) ÷[(+)×] (69)(+)×30
(70)×-÷ (71) ×58+×41+
(72) ××- (73) ×+÷
(74) ÷[(-)÷] (75) ×153 – 0.6×53
(76)(+)÷+ (77)×[÷(×)]
(78) (+)×15×11 (79)
(80) 46× (81) 2008×
(82) ×× (83) ×+×
(84)36× (85)-×
(86) ×101— (87)
(88) × +× (89)17×
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