我现在需要六年级数学简便运算60道带答案,谢谢

2024-11-25 20:32:03
推荐回答(5个)
回答1:

(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
=2003

回答2:

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+8.3×3.7
8.3×(6.3+3.7)
=8.3×10
=83

1.24+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

回答3:

六年级数学简便计算练习题
二、用简便方法计算下面各题。(90分,4×20+5×2)
1125-997 998+1246 4+3.2+5+6.8 12-(1+2) 400÷125÷8 25×(37×8)
(-)×12 1×2× 34×(2+) 125×8.8 4.35+4.25+3.65+3.75 3.4×99+3.4
17.15-8.47-1.53 17-3-4 ÷2+× 0.125×0.25×32 22.3-2.45-5.3-4.55
(++)×72 4.25-3-(2-1) 187.7×11-187.7 43×+57.125×-0.5 ×(-÷)
2.42÷+4.58×-4÷3 ×6.6+2.5× -- 4.6+++5.4 2.8++7.2+ -(+)
+2.25++ ++ -+ +-++ 0.75+++0.375 5--
++++ 48.3-- ×4.25+÷6 0.625×0.5++×62.5% ×÷ +(-1.8)
2.5×(+++) 22×+25×75%-7×0.75 0.25×63.5-× ×2.5-× +3.125++ 1125-996
(111+999) ÷[56×(-)] 49.5×-(50-)×0.6 ×+÷+ 45×(+-0.6) 897×-37.5%+104×0.375
×(-5.375) 3.5×+1.25×+3.8÷ 71×99 3755+2996 8439+1001 446+295 888+999
72×156-56×72 25×32×125 709×99+709 14. 0.25×48 2.5×0.4×2 299×101 563×999
2×6.6+2.5×6 75.3×99+75.3 4.6×3.7+54×0.37 0.125×+×8.25+12.5% 8.37-3.25-(1.37+1.75) 2100÷20
11―6―1 15―4.25―5 19.82―6.57―3.43 4.6+3+6+5.4 4+2.25+5+7 9.63÷2.5÷4 6÷0.25
3-- ×+× ×+÷ 18×(+) ×7+×5 (-)×(24-)
(×+)÷ ÷[(+)×] ×7+×5 (-)×24-) (×+)÷ ÷[(+)×]
(32×+17)÷ (25+)÷+ ×+×+ (21×+×21)× (99+)÷9 ×÷
÷[(+)×] (+)×30 +3÷ ×-÷ 4-- ×58+×41+
××- ×+÷ ÷[(-)÷] 235 - 135÷18 ×153 – 0.6×53 (+)÷+
10 - - + 25×÷× 13.09-8.12-4.88 12×103-4500÷75 ×[÷(×)] (+)×15×11

回答4:

1+2+4+8+16+32+64+128+256
=256*2-1
=512-1
=511
9999*7777+3333*6666
=(1111*9)*(1111*7)+(1111*3)*(1111*6)
=1111*(9*7+3*6)
=89991

回答5:

1/3+1/4=7/12