题目内容
43+1.47= 44.47 44.47 |
5-3.28= 1.72 1.72 |
0.46÷4.6= 0.1 0.1 |
4×0.25= 1 1 |
3÷0.3= 10 10 |
4.5×0.4= 1.8 1.8 |
0.63÷0.7= 0.9 0.9 |
85÷(1-0.9)= 850 850 |
49×0.2= 9.8 9.8 |
10÷2.5= 4 4 |
1.8×0.4= 0.72 0.72 |
9.58×101-9.58= 958 958 . |
分析:根据小数加减乘除法的计算方法进行计算.
9.58×101-9.58根据乘法分配律进行简算.
9.58×101-9.58根据乘法分配律进行简算.
解答:解:
43+1.47=44.47 | 5-3.28=1.72 | 0.46÷4.6=0.1 |
4×0.25=1 | 3÷0.3=10 | 4.5×0.4=1.8 |
0.63÷0.7=0.9 | 85÷(1-0.9)=850 | 49×0.2=9.8 |
10÷2.5=4 | 1.8×0.4=0.72 | 9.58×101-9.58=958 |
点评:口算时,注意运算符号和数据,然后再进一步计算.
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观察上表回答问题:
(1)张艳(女)10米×4是11″8;1分钟仰卧起坐40次;立定跳远1.92米,她的总得分是 .
(2)王刚(男)达标抽测以上三项一共得了270分,他10米×4是 一分钟仰卧起坐 次,立定跳远 米.
(3)男、女生立定跳远成绩排列的规律是 .
项目分数 | 10米×4 往返跑(秒) |
1分钟仰卧 起坐(次) | 立定跳远(米) | |
100 | 男 | 10″0 | 51 | 2.19 |
女 | 11″2 | 48 | 1.96 | |
95 | 男 | 10″2 | 49 | 2.15 |
女 | 11″4 | 46 | 1.92 | |
90 | 男 | 10″4 | 47 | 2.11 |
女 | 11″6 | 44 | 1.88 | |
85 | 男 | 10″6 | 45 | 2.07 |
女 | 11″8 | 42 | 1.84 | |
80 | 男 | 10″8 | 43 | 2.03 |
女 | 12″0 | 40 | 1.80 |
(1)张艳(女)10米×4是11″8;1分钟仰卧起坐40次;立定跳远1.92米,她的总得分是
(2)王刚(男)达标抽测以上三项一共得了270分,他10米×4是
(3)男、女生立定跳远成绩排列的规律是
(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)(-+)×12 | (31)(+-)÷ | (32)24×(+-) | (33)24÷(+-) |
(34)1.25×3.6+1.25×+ | (35)3.3×+0.75×+75% | (36)×6.6+7.5× | (37)9.56×180-95.6×8 |
(38)4.8×37+47×6.3 | (39)9.5×8.8+0.12×95 | (40)×21 | (41)×33 |
(42)÷ | (43)÷ | (44)÷42 | (45)6×0.75+5×-3÷4 |
(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)×9+ | (84)(5+)× | (85)(+)×24 |
(86)(20+)× | (87)×39× | (88)×(+) | (89)(-)×12 |
(90)×(26×) | (91)+++ | (92)17×- | (93)(+)× |
(94)(+)÷ | (95)(+)÷3 | (96)(-)÷ | (97)÷+÷ |
(98)×(10+) | (99)(21+)÷ | (100)×+× | (101)÷+÷ |
(102)(-)÷ | (103)×++ | (104)_×- | (105)-(÷+) |
(106)+×+ | (107)1-÷- | (108)×+÷4 | (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)(+)×36 |
(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)×45-÷ | (131)48×(-) | (132)×+× | (133)(32+)÷4 |
(134)÷÷ | (135)46× | (136)×+÷9 |