1 乘法分配律练习题 乘法分配律特别要注意“两个数的和与一个数相乘,可以先把它们与这个数分别相乘,再相加”中的分别两个字。(a+b)×c = a×c + b×c 类型一: (40+6)×25 125×(4+80) 32×(100+50) 24×(2+20) 86×(100-21) 15×(40-6) 类型三: 78×102 69×102 25×42 56×101 52×104 125×83 类型四: 31×99 42×98 25×39 29×99 85×98 125×79 2 类型五: 8 3 +8 3 ×9 9 5 6 +5 6 ×9 9 1 2 5 ×8 1 -1 2 5 9 9 ×9 9 +9 9 7 5 ×1 0 1 -7 5 9 1 ×3 1 -9 1 简便计算 120 道练习题 (1)67+42+33+58 (2)258-58-26-74 (3)125×16 (4)50×(2×4)×25 (5)7×8×3×125 (6)26×103 (7)501×12 (8)25×(40+8) (9)39×14+61×14 (10)163×8+37×8 (11)202×13 (12)77×4×5 (13)27×99 (14)48×250 (15)98+303 3 (16)49+49×49 (17)55×25+25×45 (18)123×67-23×67 (19)39×101-39 (20)99×64+64 (21)76×23+24×23 (22)12+19×12 (23)21+254+79+46 (24)25×16×5 (25)52×32+48×32 (26)18×137-18×37 (27)450÷18 (28)420÷35 (29)480÷15 (30)21×99 (31)125×32 (32)12×301 (33)75×3×4 (34)19+99×19 (35)256×9-46×9 (36)13+13×49 (37)(25+125)×8 (38)541×67-67×441 (39)43×201 4 (40)102×35 (41)304×22 (42)(30+4)×25 (43)38×7+62×7 (44)152×8+148×8 (45)16×401 (46)103×23(47) (30+2)×15 (48)125×(8+16) (49)68×48+68×2 (50)5×27+63×5 (51)12×(40-5) (52)35×98 (53)64×9-14×9 (54)23×134-34×23 (55)102×45 (56)648+203 (57)98×32 (58)44×25 (59)63+15×2 (60)43+43×39 (61)27×37+37×23 (62)256×7-56×7 (63)48×101-48 (64)99×62+62 (65)41×99 (66)765+98 5 (67)560÷16 (68)201×34 (69)36×25 (70)304+297 (71)18×45+18×55 (72)226×13-26×13 (73)15×301-15 (74)(30+8)×25 (75)25×65+25×25 (76)75×141-75×40 (77)125×18 (78)25×35+25 (79)71×23-71×13 (80)125×(80-8) (81)101×89-89 (82)88×22+22×12 (83)28×57+43×28 (84)202×41 (85)25×19×4 (86)47+99+47 (87)103×37 (88)34×201 (89)25×5×16 (90)56+56×49 (91)57×26+26×43 (92)373×9-73×9 (93)78×101-78 6 (94)199×53+53 (95)25×124-24×25 (96)250×28 (97)125×16 (98)250×9×4 (99)48×125 (100)402×15 (101)(25+250)×4 (102)199×9+199 (103)24×250 (104)27×18+82×27 (105)2×46+46×18 (106)401×25 (110)25×19 (107)72×101 (108)42×(30-1) (109)101×85-85 (111)152×49+51×152 (112)24×25 (113)93×99+93 (114)13×125×8 (115)125×17+63×125 (116)492-145-155 (117) 43×25×2