
+++ --+
4+8+3 +1++
3-- 15-7-2.8
++ -(+)
-+- +-
-(+) -(-)
-( -) +++
+(+) -+ -
5+6+3+2.7 3.82+(7-2.82)-5
3.825+2+1 15+1-2
10-2-3 4.375+6-4+5
10-(2+3.9) 1--
+(+) +- +-
解方程
+x= x-=
=x+0.25 x-=
x+3.5×2=12 0.6x-0.5=3.1
15.375+5x=20 +(x-)=3
x+3=5.375 x-(-)=
3x-= +X=
X+(-)= X-(-)=
+(X-) X-=
2X-= -x=3.2
x-(-)= +(x-)=2
++ 1--
-+ --
++ +- +-
-(+) -+
+- +(-)
1-(+) 1-(-)
-(+) +-
给下面的分数约分
将下列各组分数通分
和 和
分数乘除法简便运算专题练习
(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) (50)×+×
(44)6.8×+×3.2 (45) 101×
(46) +×15 (47)8÷8
(48) ×+× (49)( 90+)×
(51)×+÷ (52)18×(+)
(53)×7+×5 (54)(-)×(24-)
(55)(×+)÷ (56)÷[(+)×]
(57) ×+× (58)×3
(59) (60)
(61) (32×+17)÷ (62)(25+)÷+
(63) ×+×+
() (65)
(66)(21×+×21)× (67)(99+)÷9
(68) ÷[(+)×] (69)(+)×30
(70)×-÷ (71) ×58+×41+
(72)××- (73) ×+÷
(73)÷[(-)÷] (75) ×153 – 0.6×53
(76)(+)÷+ (77)×[÷(×)]
(78) (+)×15×11 (79)
(80) 46× (81) 2008×
(82) ×× (83) ×+×
(84)36× (85)-×
(86) ×101- (87)
(88) × +× ()17×
