1樓:匿名使用者
一、運用加法結合律進行簡算:
(a+b)+c=a+(b+c) 或a+b+c+d=(a+c)+(b+d)
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
二、運用乘法結合律進行簡算:
這種題型往往含特殊數字之間相乘
(a×b)×c=a×(b×c)
特殊數字之間相乘:
25×4=100 125×8=1000 25×8=200 125×4=500
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
三、利用乘法分配律進行簡算:
(a+b)×c=a×c+ b×c
(a-b)×c=a×c- b×c
做這種題,一定不要急著去算,先要分析各數字之間的特殊關係,找到做題的竅門。
例5、(2.5+12.5)×40
=2.5×40+12.5×40
=100+500
=600
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
2樓:瀛洲煙雨
常見以下幾類題型:
一、運用加法結合律進行簡算
(a+b)+c=a+(b+c) 或a+b+c+d=(a+c)+(b+d)
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
二、運用乘法結合律進行簡算:這種題型往往含特殊數字之間相乘
(a×b)×c=a×(b×c)
特殊數字之間相乘:
25×4=100 125×8=1000 25×8=200 125×4=500
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
2.5×0.125×8×4等,如果遇到除法同樣適用,或將除法變為乘法來計算。如:8.3×67÷8.3÷6.7等。
三、利用乘法分配律進行簡算:
(a+b)×c=a×c+ b×c
(a-b)×c=a×c- b×c
做這種題,一定不要急著去算,先要分析各數字之間的特殊關係。也就是先要仔細觀察,找到做題的竅門。
例5、(2.5+12.5)×40
=2.5×40+12.5×40
=100+500
=600
3樓:
(1+1)×2 =1×2+1×2 =4
4樓:翔亡233中通快遞查詢
13.67+6.33應該等於20,他上面是10
5樓:
8.3x(6.3+3.7)
=8.3x10=83
簡便計算100道及答案
6樓:匿名使用者
300÷125÷8
=300÷(125×8)
=300÷1000
=0.3
396-96-172-28
=(396-96)-(172+28)
= 300-200
= 100
125*24
= 125*8*3
= 1000*3
= 3000
360÷24
=360÷6÷4
=60÷4
=15240÷48
=240÷24÷2
=10÷2
=5800÷32
=800÷8÷4
=100÷4
=2527+456+73
=(27+73)+456
=100+456
=556
24÷4+56÷4
=(24+56)÷4
=80÷4
=202.5×0.7×0.8
=(2.5×0.8)×0.7
=60×0.7
=42其它還有一些題目如下:
27+456+73
10-0.4-2.6
0.43+8.6+0.57
244+182+156
14.02-3.5-6.5
2.78+19+199
912-163-237
7樓:隔壁小陶噢
6.5×(5+5)
=6.5×10
=650.4×125×25×0.8
=(0.4×25)×(125×0.8)
=10×100=1000
1.25×(8+10)
=1.25×8+1.25×10
=10+12.5=22.5
9123-(123+8.8)
=9123-123-8.8
=9000-8.8
=8991.2
1.24×8.3+8.3×1.76
=8.3×(1.24+1.76)
=8.3×3=24.9
9999×1001
=9999×(1000+1)
=9999×1000+9999×1
=10008999
14.8×6.3-6.
3×6.5+8.3×3.
7=(14.8-6.5)×6.
3+8.3×3.7=8.
3×6.3+8.3×3.
78.3×(6.3+3.7)
=8.3×10
=831.24+0.78+8.76
=(1.24+8.76)+0.78
=10+0.78
=10.78
933-157-43
=933-(157+43)
=933-200
=733
4821-998
=4821-1000+2
=3823
i32×125×25
=4×8×125×25
=(4×25)×(8×125)
=100×1000
=100000
9048÷268
=(2600+2600+2600+1248)÷26=2600÷26+2600÷26+2600÷26+1248÷269=100+100+100+48
=348
2881÷ 43
=(1290+1591)÷ 434
=1290÷43+1591÷43
=30+37
3.2×42.3×3.
75-12.5×0.423×16=3.
2×42.3×3.75-1.
25×42.3×1.6=42.
3×(3.2×3.75-1.
25×1.6)=42.3×(4×0.
8×3.75-1.25×4×0.
4)=42.3×(4×0.4×2×3.
75-1.25×4×0.4)=42.
3×(4x0.4x7.5-1.
25x4x0.4)=42.3×[4×0.
4×(7.5-1.25)]=42.
3×[4×0.4×6.25]
=42.3×(4×2.5)
=4237
1.8+18÷1.5-0.5×0.3
=1.8+12-0.15
=13.8-0.15
=13.65
6.5×8+3.5×8-47
=52+28-47
=80-47
(80-9.8)×5分之2-1.32
=70.2x2/5-1.32
=28.08-1.32
=26.76
8×7分之4÷[1÷(3.2-2.95)]=8×4/7÷[1÷0.25]
=8×4/7÷4
=8/7
2700×(506-499)÷900
=2700×7÷900
=18900÷900
=2133.02-(148.4-90.85)÷2.5=33.02-57.55÷2.5
=33.02-23.02
=10(1÷1-1)÷5.1
=(1-1)÷5.1
=0÷5.1
=018.1+(3-0.299÷0.23)×1=18.1+1.7×1
=18.1+1.7
=19.8
3.42×5.7+4.3×3.42 8.75×11-8.75 7.42×20.1
5.9×2.7+0.59×73 0.358×14.7+35.8×0.853
2.7×3.014 0.847×35 0.079×0.23望採納。❤️❤️❤️
8樓:綱寄鬆
125×(40-4)
9樓:
外0+2+2+2.22狗屎。
10樓:奶糖悅悅
解決了不會出題的困擾
11樓:乾皖禕
100道不是乘法的簡便方法
12樓:life鳳凰于飛
25x32x125
=(25x4)x(8x125)
=100x1000
=100000
13樓:海鹽芝士
我覺得可以,請你們不要罵他了,出題也不容易。
14樓:卯德海
88x125
=(80+8)ⅹ125
=80╳125+8x125
=10000十100
=11000
17x99+17x1
=17x(99+1)
=17x100
=1700
3000÷125÷8
=3000÷(125╳8)
=3000÷1000=3
15樓:新野旁觀者
0.4×125×25×0.8
=(0.4×25)×(125×0.8)
=10×100=1000
1.25×(8+10)
=1.25×8+1.25×10
=10+12.5=22.5
9123-(123+8.8)
=9123-123-8.8
=9000-8.8
=8991.2
1.24×8.3+8.3×1.76
=8.3×(1.24+1.76)
=8.3×3=24.9
9999×1001
=9999×(1000+1)
=9999×1000+9999×1
=10008999
14.8×6.3-6.
3×6.5+8.3×3.
7=(14.8-6.5)×6.
3+8.3×3.7=8.
3×6.3+8.3×3.
78.3×(6.3+3.7)
=8.3×10
=831.24+0.78+8.76
=(1.24+8.76)+0.78
=10+0.78
=10.78
933-157-43
=933-(157+43)
=933-200
=733
4821-998
=4821-1000+2
=3823
i32×125×25
=4×8×125×25
=(4×25)×(8×125)
=100×1000
=100000
9048÷268
=(2600+2600+2600+1248)÷26=2600÷26+2600÷26+2600÷26+1248÷269=100+100+100+48
=348
2881÷ 43
=(1290+1591)÷ 434
=1290÷43+1591÷43
=30+37
3.2×42.3×3.
75-12.5×0.423×16=3.
2×42.3×3.75-1.
25×42.3×1.6=42.
3×(3.2×3.75-1.
25×1.6)=42.3×(4×0.
8×3.75-1.25×4×0.
4)=42.3×(4×0.4×2×3.
75-1.25×4×0.4)=42.
3×(4x0.4x7.5-1.
25x4x0.4)=42.3×[4×0.
4×(7.5-1.25)]=42.
3×[4×0.4×6.25]
=42.3×(4×2.5)
=4237
1.8+18÷1.5-0.5×0.3
=1.8+12-0.15
=13.8-0.15
=13.65
6.5×8+3.5×8-47
=52+28-47
=80-47
(80-9.8)×5分之2-1.32
=70.2x2/5-1.32
=28.08-1.32
=26.76
8×7分之4÷[1÷(3.2-2.95)]=8×4/7÷[1÷0.25]
=8×4/7÷4
=8/7
2700×(506-499)÷900
=2700×7÷900
=18900÷900
=2133.02-(148.4-90.85)÷2.5=33.02-57.55÷2.5
=33.02-23.02
=10(1÷1-1)÷5.1
=(1-1)÷5.1
=0÷5.1
=018.1+(3-0.299÷0.23)×1=18.1+1.7×1
=18.1+1.7
=19.8
3.42×5.7+4.3×3.42 8.75×11-8.75 7.42×20.1
5.9×2.7+0.59×73 0.358×14.7+35.8×0.853
2.7×3.014 0.847×35 0.079×0.23
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