1樓:瀛洲煙雨
例1、5.76+
13.67+4.24+6.33
=(5.76+4.24)+(13.67+6.33)=10+10
=20例2、37.24+23.79-17.24
=37.24-17.24+23.79
=20+23.79
=43.79
例3、 4×3.78×0.25
=4×0.25×3.78
=1×3.78
=3.78
例4、 125×246×0.8
=125×0.8×246
=100×246
=24600
例5、(2.5+12.5)×40
=2.5×40+12.5×40
=100+500
=600
例6、3.68×4.79+6.32×4.79=(3.68+6.32)×4.79
=10×4.79
=47.9
例7. 26.86×25.66-16.86×25.66=(26.86-16.86) ×25.66=10×25.66
=256.6
例8、 5.7×99+5.7
= 5.7×(99+1)
=5.7×100
=570
例9、34×9.9
=34×(10-0.1)
=34×10-34×0.1
=340-3.4
=336.6
例10、 57×101
=57×(100+1)
=57×100+57×1
=5757
例11、7.8×1.1
=7.8×(1+0.1)
=7.8×1+7.8×0.1
=7.8+0.78
=8.58
例12、25×32
=25×4×8
=100×8
=800
例13、125×0.72
=125×8×0.09
=1000×0.09
=90例14、87×2/85
=(85+2) ×2/85
=85×2/85+2×2/85
=2+4/85
=2又4/85
例15、56.5-3.7-6.3
=56.5-(3.7+6.3)
=56.5-10
=46.5
例16、32.6÷0.4÷2.5
=32.6÷(0.4×2.5)
=32.6÷1
=32.6
例16、86.7×0.356+1.33×3.56=8.67×3.56+1.33×3.56
=(8.67+1.33)×3.56
=10×3.56
=35.6
例17、15.6÷4-5.6×1/4
=15.6×1/4-5.6×1/4
=(15.6-5.6)×1/4
=10×1/4
=2又1/2
例18、16/23×27+16×19/23=27/23×16+16×19/23
=16×(27/23+19/23)
=16×2=32
2樓:巨集哥
0.25×1.25×32
=(0.25×4)×(1.25×8)
=1×10=10
3樓:歐璟衛思山
簡便計算題:
1)6.9+4.8+3.1
0.456+6.22+3.78
2)4.02+5.4+0.98
5.17-1.8-3.2
13.75-(3.75—6.48)
3)3.68+7.56-2.68
7.85+2.34-0.85+4.66
35.6-1.8-15.6-7.2
4)3.82+2.9+0.18+9.1
9.6+4.8-3.6
7.14-0.53-2.47
5)5.27+2.86-0.66+1.6313.35-4.68+2.65
6)47.8-7.45+8.8
0.398+0.36+3.64
15.75+3.59-0.59+14.257)66.86-8.66-1.34
0.25×16.2×4
(1.25-0.125)×8
8)3.6×102
3.72×3.5+6.28×3.5
36.8-3.9-6.1
9)28.6×101-28.6
4.8×7.8+78×0.52
32+4.9-0.9
10)4.8×100.1
56.5×9.9+56.5
7.09×10.8-0.8×7.09
11)25.48-(9.4-0.52)
4.2÷3.5
320÷1.25÷8
12)18.76×9.9+18.76
3.52÷2.5÷0.4
3.9-4.1+6.1-5.9
13)5.6÷3.5
9.6÷0.8÷0.4
4.2×99+4.2
14)17.8÷(1.78×4)
0.49÷1.4
1.25×2.5×32
15)15.2÷0.25÷4
146.5-(23+46.5)
16)3.83×4.56+3.83×5.444.36×12.5×8
9.7×99+9.7
17)27.5×3.7-7.5×3.7
8.54÷2.5÷0.4
0.65×101
18)(45.9-32.7)÷8÷0.1253.14×0.68+31.4×0.032
5.6÷1.25÷0.8÷2.5÷0.4
19)7.2×0.2+2.4×1.4
7.74×(2.8-1.3)+1.5×2.2620)3.9×2.7+3.9×7.3
18-1.8÷0.125÷0.8
12.7×9.9+1.27
21)21×(9.3-3.7)-5.6
15.02-6.8-1.02
5.4×11-5.4
22)2.3×16+2.3×23+2.3
9.43-(6.28-1.57)
3.65×4.7-36.5×0.37
23)46×57+23×86
13.7×0.25-3.7÷4
2.22×9.9+6.66×6.7
24)101×0.87-0.91×87
10.7×16.1-15.1×10.7
0.79×199
25)4.8+8.63+5.2+0.37
5.93+0.19+2.81
1.76+0.195+3.24
26)2.35+1.713+0.287+7.651.57+0.245+7.43
6.02+3.6+1.98
27)0.134+2.66+0.866
1.27+3.9+0.73+16.1
7.5+4.9-6.5
28)3.07-0.38-1.62
1.29+3.7+2.71+6.3
8-2.45-1.55
29)3.25+1.79-0.59+1.7523.4-0.8-13.4-7.2
0.32×403
30)3.2+0.36+4.8+1.64
1.23+3.4-0.23+6.6
0.25×36
31)12.7-(3.7+0.84)
36.54-1.76-4.54
0.25×0.73×4
32)7.6×0.8+0.2×7.6
0.85×199
0.25×8.5×4
33)1.28×8.6+0.72×8.6
12.5×0.96×0.8
10.4-9.6×0.35
34)0.8×(4.3×1.25)
3.12+3.12×99
4樓:匿名使用者
例1、5.76+13.67+4.24+6.33=(5.76+4.24)+(13.67+6.33)=10+10
=20例2、37.24+23.79-17.24=37.24-17.24+23.79
=20+23.79
=43.79
例3、 4×
3.78×0.25
=4×0.25×3.78
=1×3.78
=3.78
例4、 125×246×0.8
=125×0.8×246
=100×246
=24600
例5、(2.5+12.5)×40
=2.5×40+12.5×40
=100+500
=600
例6、3.68×4.79+6.32×4.79=(3.68+6.32)×4.79
=10×4.79
=47.9
例7. 26.86×25.66-16.86×25.66=(26.86-16.86) ×25.66=10×25.66
=256.6
例8、 5.7×99+5.7
= 5.7×(99+1)
=5.7×100
=570
例9、34×9.9
=34×(10-0.1)
=34×10-34×0.1
=340-3.4
=336.6
例10、 57×101
=57×(100+1)
=57×100+57×1
=5757
例11、7.8×1.1
=7.8×(1+0.1)
=7.8×1+7.8×0.1
=7.8+0.78
=8.58
例12、25×32
=25×4×8
=100×8
=800
例13、125×0.72
=125×8×0.09
=1000×0.09
=90例14、87×2/85
=(85+2) ×2/85
=85×2/85+2×2/85
=2+4/85
=2又4/85
例15、56.5-3.7-6.3
=56.5-(3.7+6.3)
=56.5-10
=46.5
例16、32.6÷0.4÷2.5
=32.6÷(0.4×2.5)
=32.6÷1
=32.6
例16、86.7×0.356+1.33×3.56=8.67×3.56+1.33×3.56
=(8.67+1.33)×3.56
=10×3.56
=35.6
例17、15.6÷4-5.6×1/4
=15.6×1/4-5.6×1/4
=(15.6-5.6)×1/4
=10×1/4
=2又1/2
例18、16/23×27+16×19/23=27/23×16+16×19/23
=16×(27/23+19/23)
=16×2例1、5.76+13.67+4.24+6.33=(5.76+4.24)+(13.67+6.33)=10+10
=20例2、37.24+23.79-17.24=37.24-17.24+23.79
=20+23.79
=43.79
例3、 4×3.78×0.25
=4×0.25×3.78
=1×3.78
=3.78
例4、 125×246×0.8
=125×0.8×246
=100×246
=24600
例5、(2.5+12.5)×40
=2.5×40+12.5×40
=100+500
=600
例6、3.68×4.79+6.32×4.79=(3.68+6.32)×4.79
=10×4.79
=47.9
例7. 26.86×25.66-16.86×25.66=(26.86-16.86) ×25.66=10×25.66
=256.6
例8、 5.7×99+5.7
= 5.7×(99+1)
=5.7×100
=570
例9、34×9.9
=34×(10-0.1)
=34×10-34×0.1
=340-3.4
=336.6
例10、 57×101
=57×(100+1)
=57×100+57×1
=5757
例11、7.8×1.1
=7.8×(1+0.1)
=7.8×1+7.8×0.1
=7.8+0.78
=8.58
例12、25×32
=25×4×8
=100×8
=800
例13、125×0.72
=125×8×0.09
=1000×0.09
=90例14、87×2/85
=(85+2) ×2/85
=85×2/85+2×2/85
=2+4/85
=2又4/85
例15、56.5-3.7-6.3
=56.5-(3.7+6.3)
=56.5-10
=46.5
例16、32.6÷0.4÷2.5
=32.6÷(0.4×2.5)
=32.6÷1
=32.6
例16、86.7×0.356+1.33×3.56=8.67×3.56+1.33×3.56
=(8.67+1.33)×3.56
=10×3.56
=35.6
例17、15.6÷4-5.6×1/4
=15.6×1/4-5.6×1/4
=(15.6-5.6)×1/4
=10×1/4
=2又1/2
例18、16/23×27+16×19/23=27/23×16+16×19/23
=16×(27/23+19/23)
=16×2=32
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