1樓:樂觀的藍色小鳥
1.) 0.25+0.75/25*4
2. ) 4.6*3.7+4.6+4.6*5.33. )1.25*6.4*25
4. )35.2/【(20.
5-9.5)*0.4】-0.
65.) 5.08*3.
5+2.52/2.46)(9.
9+9.9*3)*2.5
7)4.66-7.7/2.
5)*(1-0.45)7)46*0.187-1.
87+6.4*1.878)[0.
02+(7.28-0.48)*1.
5]/1029)0.8*(3.2-2.
99/2.3)
10)8.65-3.7+1.35-6.3
11)7.05*23.7+7.05*76.312)3.5-3.5*0.95
13)8*(12.5+0.25)*4
14)9.9*1.01
15)402*10.1
16)[(4.3-3.8)*0.8-0.1]17)27.8/2.5/4
18)1200/12.5
19)2.5*6.4*12.5
20)7.25+7.25*97+7.25*221)125*63+125
22)9.03-0.18+0.82
23)155*(164/4-11)
24)243.56-73.88-26.1225)82.48-15.75+18.75
26)4.69-1.75-6.25+6.3127)125*99+25
28)8.32+7.6+0.68+2.4
29)(124-85)*54/26
30)199*99+99*2
31)8160/[145-(78+27)]32)2.8*0.7*0.5
33)3.6*0.9*1.4
34)56*32*0.16
35)7.4*0.13*0.35
36)0.364*0.25*18
37)4.07*3600*8.5
38)50.9*(1.13+5.77)
39)2.5*(10.8-9.76)
40)93.2*(7-6.56)
41)870*(1.5+2.01)
42)10.76*1.01-7.5
43)10.4-0.104*100
44)2.8*0.36+8.736
45)6.2*1.01
46)3.2*0.25
47)(1.25+2.5)*8
48)3.75*98+3.75*2
49)5.7*99+5.7
50)025*32*2.5
51)10.8*4.2+4.
2*1.2-4.2*252)6.
58*0.12+33.42*0.
1253)8.6*2.7+3.
5*1.6
54)7.8*1.25+8
55) 4000÷25
56) 7.41+4.6+2.59+5.457)18×(210-93)÷26
58) 9.14-4.57-0.57
59) 65×35+65×65
60) 3960÷[145-(27+88)]61) 64000÷250
62) 7.84-2.93-0.93
63) 6.51+7.8+3.49+2.264) 52×(207+93)÷13
65) 47×53+47×47
66) 14443÷[162-(97-78)]158+262+138 375+219+381+225 5001-247-1021-232
(181+2564)+2719
378+44+114+242+222
276+228+353+219
(375+1034)+(966+125)
(2130+783+270)+1017
99+999+9999+99999
7755-(2187+755)
2214+638+286
3065-738-1065
2357-183-317-357
2365-1086-214
3999+498
1883-398
75×24
138×25×4
(13×125)×(3×8)
(12+24+80)×50
704×25
25×32×125
32×(25+125)
88×125
102×76
58×98
178×101-178
84×36+64×84
75×99+2×75
83×102-83×2
98×199
123×18-123×3+85×123
50×(34×4)×3
25×(24+16)
178×99+178
79×42+79+79×57
7300÷25÷4
8100÷4÷75
16800÷120
30100÷2100
32000÷400
49700÷700
1248÷24
3150÷15
4800÷25
21500÷125
2356-(1356-721)
1235-(1780-1665)
75×27+19×2 5
應該差不多了吧
2樓:奔放神
1+1+2+3+4……+180
希望對你能有所幫助。
脫式計算簡便180道不簡便180道帶答案。
3樓:新野旁觀者
(1)2.5*32*0.125
=(2.5*4)*(8*0.125)
=10*1
=10(2)3.5-7+6.5
=3.5+6.5-7
=3(3)1.2×2.5+0.8×2.5
=2.5(1.2+0.8)
=25(4)8.9×1.25-0.9×1.25
=1.25(8.9-0.9)
=10(5)12.5×7.4×0.8
=12.5×0.8×7.4
=74(6)6.5×9.5+6.5×0.5
=6.5×(9.5+0.5)
=6.5×10
=65(7)0.35×1.6+0.35×3.4
=0.35*(1.6+3.4)
=0.35*5
=1.75
(8)6.72-3.28-1.72
=6.75-(3.28+1.72)
=6.75-5
=1.75
(9)0.45+6.37+4.55
=0.45+4.55+6.37
=5+6.37
=11.37
(10)28×12.5-12.5×20
=(28-20)*12.5
=8*12.5
=100
(11)23.65-(3.07+3.65)
=23.65-3.65-3.07
=20-3.07
=16.93
(12)(4+0.4×0.25)8×7×1.25
=(4+1)*7*10
=5*7*10
=350
(13)1.65×99+1.65
=1.65*(99+1)
=1.65*100
=165
(14)27.85-(7.85+3.4)
=27.85-7.85+3.4
=20+3.4
=23.4
(15)48×1.25+50×1.25×0.2×8
7.8×9.9+0.78
=7.8*(9.9+0.1)
=7.8*10
=78(16)4.8×46+4.8×54
=(46+54)*4.8
=100*4.8
=480
(17)673-327-173
=673-(327+173)
=673-500
=173
(18)4.44*2.5
=1.11*(4*2.5)
=1.11*10
=11.1
(19)3.5÷1.4
=(3.5÷0.7)÷(1.4÷0.7)
=5÷2
=2.5
(20)1+2+3+4+5......+99+100
=(1+99)+(2+98)+(3+97)+......+(49+51)+50
=(100÷2-1)*100+50
=4900+50
=4950⑴運用加法交換律進行簡便計算。
0.88+5.6+0.12 1.78+3.5+0.22 5.6+2.08+14.4
=0.88+0.12+5.6 =1.78+0.22+3.5 =5.6+14.4+2.08
=1+5.6 =2+3.5 =20+2.08
=6.6 =5.5 =22.08
⑵運用加法結合律進行簡便計算
2.3+(0.56+4.7) 28.6+0.54+0.46+1.4 5.82+4.56+5.44
=(2.3+4.7)+0.56 =(28.6+1.4)+(0.54+0.46) =5.82+(4.56+5.44)
=7+0.56 =30+1 =5.82+10
=7.56 =31 =15.82
⑶、運用乘法交換律進行簡便計算。
25×0.37×0.4 7.5×0.39×4 6.5×1.1×4 1.25×3.9×0.8
=25×0.4×0.37 =7.5×4×0.39 =6.5×4×1.1 =1.25×0.8×3.9
=10×0.37 =30×0.39 =26×1.1 =1×3.9
=3.7 =11.7 =28.6 =3.9
⑷、運用乘法結合律進行簡便計算。
1.9×7.5×8 6.2×0.8×2.5 4.3×1.5×6 4.1×3.5×2
=1.9×(7.5×8) =6.2×(0.8×2.5) =4.3×(1.5×6) =4.1×(3.5×2)
=1.9×60 =6.2×2 =4.3×9 =4.1×7
=114 =12.4 =38.7 =28.7
⑸、運用乘法分配律的加法進行簡算。
13.6×4.6+4.6×6.4 0.72×23+77×0.72 2.6×32+32×2.4
=(13.6+6.4)×4.6 =(23+77)×0.72 =(2.6+2.4) ×32
=20×6.4 =100×0.72 =5×32
=128 =72 =160
⑹、運用乘法分配律的減法進行簡算。
12×5.9-5.9×2 4.6×2.5-2.5×0.6 101×9.7-9.7
=(12-2) ×5.9 =(4.6-0.6)×2.5 =(101-1)×9.7
=(12-2) ×5.9 =(4.6-0.6)×2.5 =(101-1)×9.7
=10×5.9 =4×2.5 =100×9.7
=59 =10 =970
⑺、運用減法的運算規律進行簡便計算。
1.8-0.45-0.55 54.4-4.6-5.4 35.6-0.13-0.47
=1.8-(0.45+0.55) =54.4-(4.6+5.4) =35.6-(0.13+0.47)
=1.8-1 =54.4-10 =35.6-0.6
=0.8 =44.4 =35
⑻、運用除法的運算規律進行簡便計算。
4.5÷4÷7.5 14.8÷1.25÷8 18.5÷4÷1.25 5.4÷4÷0.45
=4.5÷(4×7.5) =14.8÷(1.25×8) =18.5÷(4×1.25) =5.4÷(4×0.45)
=4.5÷30 =14.8÷10 =18.5÷5 =5.4÷0.18
=0.15 =1.48 =3.7 =30
⑼綜合運用各種運算定律進行簡算。
2.54+2.46+0.44+0.54 10.7×0.4-6.7×0.4 0.5×3.2×1.25
=(2.54+2.46)+(0.44+0.54) =(10.7-6.7)×0.4 =(0.5×4)×(0.8×1.25)
=5+1 =4×0.4 =2×1
=6 =1.6 =2
89.7+5.8-9.7+4.2 99×0.38+0.38 360÷(18×0.4)
=(89.7-9.7)+(5.8+4.2) =(99+1) ×0.38 =360÷18÷0.4
=80+10 =100×0.38 =20÷0. 4
=90 =38 =50
4.8×12.5 2.5×1.6×12.5 3.2×102
=0.6×(8×12.5) =(2.5×0.2)×(8×12.5) =3.2×(100+2)
=0.6×100 =0.5×100 =3.2×100+3.2×2
=60 =50 =320+6.4
=326.4
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