六年级数学,10道简便计算题带答案谢谢哦∩_∩
39个回答
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(1).
0.125×25×8×0.04
=(0.125×8)×(25×0.04)
=1×1
=1
(2).
73×72/1
=(72+1)×72/1
=1+72/1
=72/73
(3).
(6/5+3/1+9/1)×36
=36×6/5+36×3/1-36×9/1
=36+12-4
=38
(4).
(2/1-5/1)÷4/3÷5/3
=10/3×3/4×3/5
=5/2×5/3
=3/2
(5).
98+99×98
=(99+1)×98
=9800
(6).
101×75
=100×75+1×75
=7575
(7).
14.28÷3.5÷2
=14.28÷(3.5×2)
=14.28÷7
=2.04
(8).
7.5×0.4×25×0.8
=(0.4×25)×(7.5×0.8)
=60
(9).2/1+6/1+12/1+20/1+30/1
1 1 1 1 1
=—— +——+——+——+——
1×2 2×3 3×4 4×5 5×6
1 1
=1×(——-——)
1 6
5
=——
6
(10).
99×78+33×66
=99×78+99×22
=99×(78+22)
=99×100
=9900
0.125×25×8×0.04
=(0.125×8)×(25×0.04)
=1×1
=1
(2).
73×72/1
=(72+1)×72/1
=1+72/1
=72/73
(3).
(6/5+3/1+9/1)×36
=36×6/5+36×3/1-36×9/1
=36+12-4
=38
(4).
(2/1-5/1)÷4/3÷5/3
=10/3×3/4×3/5
=5/2×5/3
=3/2
(5).
98+99×98
=(99+1)×98
=9800
(6).
101×75
=100×75+1×75
=7575
(7).
14.28÷3.5÷2
=14.28÷(3.5×2)
=14.28÷7
=2.04
(8).
7.5×0.4×25×0.8
=(0.4×25)×(7.5×0.8)
=60
(9).2/1+6/1+12/1+20/1+30/1
1 1 1 1 1
=—— +——+——+——+——
1×2 2×3 3×4 4×5 5×6
1 1
=1×(——-——)
1 6
5
=——
6
(10).
99×78+33×66
=99×78+99×22
=99×(78+22)
=99×100
=9900
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2018-02-24
(1)2.64×1.7-2.64×0.7
=2.64×(1.7-0.7)
=2.64×1
=2.64
(2)31.5×1.07-3.15×0.7
=3.15×10.7-3.15×0.7
=3.15×(10.7-0.7)
=3.15×10
=31.5
(3)2.7×5.7-2.7+5.3×2.7
=2.7×(5.7-1+5.3)
=2.7×10
=27
(4)0.625÷0.125×0.8
=(0.625×0.8)×8÷(0.128×8)
=0.5×8÷1
=4
(5)18.6×6.1+3.9×18.6
=18.6×(6.1+3.9)
=18.6×10
=186
(6)1.3579+3.5791+5.7913+7.9135+9.1357
=(1+3+5+7+9)×1.1111
=25×1.1111
=27.7775
(7)52.5x2.9+5.45
=5.25x29+5.25+0.2
=5.25×(29+1)+0.2
=5.25×30+0.2
=157.5+0.3
=157.7
(8)0.92x15+0.08x15
=(0.92+0.08)×15
=1×15
=15
(9)0.72×1.25×2.5
=0.9×(0.8×1.25)×2.5
=0.9×1×2.5
=2.25
(10)400.6x7-2003x0.4
=200.3x14-200.3x4
=200.3×(14-4)
=200.3×10
(1)2.64×1.7-2.64×0.7
=2.64×(1.7-0.7)
=2.64×1
=2.64
(2)31.5×1.07-3.15×0.7
=3.15×10.7-3.15×0.7
=3.15×(10.7-0.7)
=3.15×10
=31.5
(3)2.7×5.7-2.7+5.3×2.7
=2.7×(5.7-1+5.3)
=2.7×10
=27
(4)0.625÷0.125×0.8
=(0.625×0.8)×8÷(0.128×8)
=0.5×8÷1
=4
(5)18.6×6.1+3.9×18.6
=18.6×(6.1+3.9)
=18.6×10
=186
(6)1.3579+3.5791+5.7913+7.9135+9.1357
=(1+3+5+7+9)×1.1111
=25×1.1111
=27.7775
(7)52.5x2.9+5.45
=5.25x29+5.25+0.2
=5.25×(29+1)+0.2
=5.25×30+0.2
=157.5+0.3
=157.7
(8)0.92x15+0.08x15
=(0.92+0.08)×15
=1×15
=15
(9)0.72×1.25×2.5
=0.9×(0.8×1.25)×2.5
=0.9×1×2.5
=2.25
(10)400.6x7-2003x0.4
=200.3x14-200.3x4
=200.3×(14-4)
=200.3×10
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