题目内容
| 4.3+5.8=________ | 3.6+6.4=________ | 0.74-0.34=________ | 0.9-0.25=________ |
| 5×4=________ | 0.21×3=________ | 0.64÷0.8=________ | 0.48÷0.12=________ |
| 88÷8=________ | 1.1×9=________ | 1÷0.25=________ | 0÷0.4=________ |
| 15÷0.3×0.1=________ | 0.4÷0.2=________ | (0.7+0.8)×3=________ | 7×1.2+0.8=________ |
| 1.8×4-1.2=________ | (2.6-1.8)×0.5=________ | 4+3.2÷0.8=________ | 0.72÷72-0.1=________ |
| 7.5÷2.5-0=________. |
10.1 10 0.4 0.65 20 0.63 0.8 4 11 9.9 4 0 5 2 4.5 9.2 6 0.4 8 -0.09 3
分析:本题按照运算法则直接计算,小数加减法注意小数点对齐,小数乘法看因数中一共的小数位数,小数除法把除数变成整数,被除数扩大相同的倍数.
解答:
点评:本题是基本的计算题目,计算时要细心,注意运算符号和数的特点.
分析:本题按照运算法则直接计算,小数加减法注意小数点对齐,小数乘法看因数中一共的小数位数,小数除法把除数变成整数,被除数扩大相同的倍数.
解答:
| 4.3+5.8=10.1 | 3.6+6.4=10 | 0.74-0.34=0.4 | 0.9-0.25=0.65 |
| 5×4=20 | 0.21×3=0.63 | 0.64÷0.8=0.8 | 0.48÷0.12=4 |
| 88÷8=11 | 1.1×9=9.9 | 1÷0.25=4 | 0÷0.4=0 |
| 15÷0.3×0.1=5 | 0.4÷0.2=2 | (0.7+0.8)×3=4.5 | 7×1.2+0.8=9.2 |
| 1.8×4-1.2=6 | (2.6-1.8)×0.5=0.4 | 4+3.2÷0.8=8 | 0.72÷72-0.1=-0.09 |
| 7.5÷2.5-0=3. |
点评:本题是基本的计算题目,计算时要细心,注意运算符号和数的特点.
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例:
3÷3+3-3=1 33÷33=1(1)
|
① 3 3 3 3=1 |
② 3 3 3 3=2 |
|
③ 3 3 3 3=3 |
④ 3 3 3 3=4 |
|
⑤ 3 3 3 3=5 |
⑥ 3 3 3 3=6 |
|
⑦ 3 3 3 3=7 |
⑧ 3 3 3 3=8 |
|
⑨ 3 3 3 3=9 |
⑩ 3 3 3 3=10 |
(2)
|
① 3 3 3 3=1 |
② 3 3 3 3=2 |
|
③ 3 3 3 3=3 |
④ 3 3 3 3=4 |
|
⑤ 3 3 3 3=5 |
⑥ 3 3 3 3=6 |
|
⑦ 3 3 3 3=7 |
⑧ 3 3 3 3=8 |
|
⑨ 3 3 3 3=9 |
⑩ 3 3 3 3=10 |
|
① 3 3 3 3=1 |
② 3 3 3 3=2 |
|
③ 3 3 3 3=3 |
④ 3 3 3 3=4 |
|
⑤ 3 3 3 3=5 |
⑥ 3 3 3 3=6 |
|
⑦ 3 3 3 3=7 |
⑧ 3 3 3 3=8 |
|
⑨ 3 3 3 3=9 |
⑩ 3 3 3 3=10 |
| 3×1.5= | 2.5×4= | 0÷0.9= | 4÷0.2= |
| 0.56÷0.7= | 0.24×5= | 0.2×5= | 2.1-0.87= |
| 3.54-3.5= | 3.4-1.5= | 12÷0.6= | 8×0.125= |
| 0.7×11= | 0.13+1.7= | 3.15÷0.5= | 0.9÷4.5= |
| 0.2×0.3= | 1.2+0.56= | 3-1.7= | 1÷0.25= |
| 78÷1.3= | 15÷0.3= | 2.1+1.49= | 6.24-1.5= |
| 1.2×0.3= | 6.3÷6.3= | 1.6×0.2= | 3.7-1.2= |
| 4.58-3.5= | 72.8÷8= | 3.5×0.3= | 0.25×100= |
| 3.2-2= | 0.51÷17= | 5.3÷0.01= | 1.03×3= |
| 2.8+12= | 3.5×2= | 2.2×0.1= | 1-0.25= |
| 0.62-0.32= | 6.3÷0.21= | 1.7×10= | 0.12×3= |
| 0.45×2= | 1.2÷0.3= | 1÷2= | 4.8×100= |
| 0.25×8= | 0.89÷8.9= | 17.8+2.2= | 0.8÷0.2= |
| 5.79÷0.1= | 0.35+0.65= | 8.9-0.9= | 9.2-9.2= |
| 3.6÷0.4= | 15.15÷15= | 0.2×0.3×0.1= | 1.34×4×2.5= |
| (1)438+203 | (2)256+199 | (3)416-302 | (4)325-198 |
| (5)278+498 | (6)3.6+2.7+6.4+7.3 | (7) | (8)1.3+4.25+3.7+3 |
| (9)1874-324-476 | (10)5-1.4-1.6 | (11)30-8.12-4.13-7.75 | (12) |
| (13)4.3-2.45+5.7-6.55 | (14)125×48 | (15)25×32 | (16)35×1.4 |
| (17)1.25×88 | (18)0.25×444 | (19)32×0.25×12.5 | (20)25×80×0.04×125 |
| (21)1.9×4×0.5 | (22)25×1.25×4×0.8 | (23)(1.6+1.6+1.6+1.6)×2.5 | (24)(0.7+0.7…+0.7)×12.5(80个0.7相加) |
| (24)9.9×8.6+8.6 | (25)99×5.4 | ||
| (26)4.8×1.01 | (27)95×101-95 | (28)95×102-190 | (29)95.6×18+0.4×18 |
| (30)( | (31)( | (32)24×( | (33)24÷( |
| (34)1.25×3.6+1.25× | (35)3.3× | (36) | (37)9.56×180-95.6×8 |
| (38)4.8×37+47×6.3 | (39)9.5×8.8+0.12×95 | (40) | (41) |
| (42) | (43) | (44) | (45)6×0.75+5× |
| (46)5.4÷1.2÷5 | (47)270÷18 | (48)120÷(1.2×4) | (49)73÷0.8÷12.5 |
| (50)16÷2.5 | (51)48÷1.25 | (52) | (53)84-(54-16) |
| (54)84-(54+16) | (55)9999×7778+3333×6666 | (56)3.6×31.4+43.9×6.4 | (57)( |
| (58) | (59) | (60) | (61) |
| (62) | (63) | (64)(0.9+5)×3+2.3 | (65)56× |
| (66) | (67)( | (68) | (69)( |
| (70)7.2÷(5-0.75-0.25) | (71)6.4+3.6÷0.5+4.5 | (72)(6.4+3.6)÷0.5+4.5 | (73)495÷55+495÷45 |
| (74)8÷0.4+8÷1.6 | (75)0.9+99×0.9 | (76)5.28-(1.62+2.28) | (77) |
| (78)4×( | (79) | (80)2-( | (81) |
| (82) | (83) | (84)(5+ | (85)( |
| (86)(20+ | (87) | (88) | (89)( |
| (90) | (91) | (92)17× | (93)( |
| (94)( | (95)( | (96)( | (97) |
| (98) | (99)(21+ | (100) | (101) |
| (102)( | (103) | (104) | (105) |
| (106) | (107)1- | (108) | (109)5-(4+ |
| (110)1125-997 | (111)7.46-0.83-2.17 | (112)12.85-1.17-8.83+1.15 | (113)4.5×102 |
| (114)0.4×6.3×25 | (115)(4.9+4.9+…+4.9)×2.5(16个4.9相加) | (116)7.5×199 | (117)( |
| (118)1.2×5.7-1.2+5.3×1.2 | (119)0.825×102-82.5 | (120)46× | (121)560÷16÷5 |
| (122)3÷2.5 | (123)84+(54-16) | (124) | (125) |
| (126)3×( | (127)7.2÷(5-0.75+0.25) | (128)725÷25+275÷25 | (129) |
| (130) | (131)48×( | (132) | (133)(32+ |
| (134) | (135)46× | (136) |