(1 )0.125×2.5×5×64
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/13 16:39:30
(1 )0.125×2.5×5×64
(2)1-2+3-4+5-6+…+1991-1992+1993
(3)9999×2222-3333×3334
(4)94×2003-93×2004
(5)25×6.78+25×3.47+125×0.0382
(6)1993×1997+1993+1999×1993-1993.
(2)1-2+3-4+5-6+…+1991-1992+1993
(3)9999×2222-3333×3334
(4)94×2003-93×2004
(5)25×6.78+25×3.47+125×0.0382
(6)1993×1997+1993+1999×1993-1993.
(1 )0.125×2.5×5×64,
=0.125×2.5×5×4×2×8,
=0.125×8×(2.5×4)×(5×2),
=1×10×10,
=100;
(2)1-2+3-4+5-6+…+1991-1992+1993,
=1+(3-2)+(5-4)+(7-6)+…+(1993-1992),
=1+1+1+1+…+1,
=997;
(3)9999×2222+3333×3334,
=3333×3×2222-3333×3334,
=3333×(6666+3334),
=3333×10000,
=3330000;
(4)94×2003-93×2004,
=94×2003-93×(2003+1),
=94×2003-93×2003-93,
=2003×(94-93)-93,
=2003×1-93,
=2003-93,
=1910;
(5)25×6.78+25×3.47+125×0.0382,
=25×6.78+25×3.47+25×5×0.0382,
=25×6.78+25×3.47+25×0.191,
=25×(6.78+3.47+0.191),
=25×10.441,
=25×(10+0.4+0.04+0.001),
=25×10+25×0.4+25×0.04+25×0.01,
=250+10+1+0.025,
=261.025;
(6)1993×1997+1993+1999×1993-1993,
=1993×1997+1999×1993,
=1993×(1997+1999),
=1993×(2000-3+2000-1),
=1993×(4000-4),
=1993×4×(1000-1),
=7972×(1000-1),
=7972×1000-7972,
=7972000-7972,
=7964028.
=0.125×2.5×5×4×2×8,
=0.125×8×(2.5×4)×(5×2),
=1×10×10,
=100;
(2)1-2+3-4+5-6+…+1991-1992+1993,
=1+(3-2)+(5-4)+(7-6)+…+(1993-1992),
=1+1+1+1+…+1,
=997;
(3)9999×2222+3333×3334,
=3333×3×2222-3333×3334,
=3333×(6666+3334),
=3333×10000,
=3330000;
(4)94×2003-93×2004,
=94×2003-93×(2003+1),
=94×2003-93×2003-93,
=2003×(94-93)-93,
=2003×1-93,
=2003-93,
=1910;
(5)25×6.78+25×3.47+125×0.0382,
=25×6.78+25×3.47+25×5×0.0382,
=25×6.78+25×3.47+25×0.191,
=25×(6.78+3.47+0.191),
=25×10.441,
=25×(10+0.4+0.04+0.001),
=25×10+25×0.4+25×0.04+25×0.01,
=250+10+1+0.025,
=261.025;
(6)1993×1997+1993+1999×1993-1993,
=1993×1997+1999×1993,
=1993×(1997+1999),
=1993×(2000-3+2000-1),
=1993×(4000-4),
=1993×4×(1000-1),
=7972×(1000-1),
=7972×1000-7972,
=7972000-7972,
=7964028.
-2.5(不知道是25还是2.5)*(-0.125)*(-4)*(4/5)*1又1/4*(-8)
2.19+6.48+0151-1.38-5.48-0.62 等于 0.125乘2.5乘5乘64等于
用简便方法计算,4.8*0.125,5*2.5*12.5*64,6.5*12.8-6.5*2.8
0.25*(-0.125)*(-64)
1除以8=0.125=( )除以64=几分之5=24分之几
简便计算:(1)3.4×7.8÷3.9(2)85÷0.17÷5(3)0.125×(2.4+0.8)×2.5(4)9.9×
25×4又1/5+64又4/9除4+0.125×248 简算,要有过程!
用简便方法计算 10.3×99+10.3 3.7×2.5+0.3×2.5 0.125×(8+0.8) 1.6×7.8×1
化简:(1)25(a-2b)^2-64(b+2a)^2 (2)1/8*1001-0.125
5×2.5×12.5×64的简便计算
1除于多少=0.125等于几分之一=( )除于32=64分之几?
1÷64÷0.05÷0.25÷0.125