1楼:柯俊喆
ヽ( `)ノヽ(#`д)ヾ(a‘)ノ
计算下面各题,怎样简便就怎样计算.4.05÷0.5+10.756.8×2.7+2.7×3.20.38×
2楼:偷艾
(1)4.05÷0.5+10.75
=8.1+10.75
=18.85
(2)6.8×2.7+2.7×3.2
=(6.8+3.2)×2.7
=10×2.7
=27(3)0.38×102
=0.38×(100+2)
=0.38×100+0.38×2
=38+0.76
=38.76
(4)70.3-17.48÷7.6
=70.3-2.3
=68(5)0.125×0.6×80
=0.125×80×0.6
=10×0.6
=6(6)8.5×1.2÷3.4
=10.2÷3.4=3
计算下面各题.(能简便的要用简便方法计算)2.3+3.91÷(22-19.7)21.6÷[64.8-(48.6-2.7×2)]0.25×0
3楼:手机用户
(1)2.3+3.91÷(22-19.7)=2.3+3.91÷2.3
=2.3+1.7
=4(2)21.6÷[64.8-(48.
6-2.7×2)]=21.6÷[64.
8-(48.6-5.4)]=21.
6÷[64.8-43.2]
=21.6÷21.6
=1(3)0.25×0.03×4
=(0.25×4)×0.03
=1×0.03
=0.03
0.13×3.89+0.13×5.11
=0.13×(3.89+5.11)
=0.13×9
=1.17
(5)10.1×87
=(10+0.1)×87
=10×87+0.1×87
=870+8.7
=878.7
计算下面各题.(能简算的要简算)(1)24×12+76×12 (2)87.5÷12.5÷8 (3)(78+34)÷18 (4)9
4楼:强颜欢笑丶炳
(1)24×制1
2+76×12,
=12×(76+24),=12
×100,
=50;
(2)87.5÷12.5÷8,
=87.5÷(12.5×8),
=87.5÷100,
=0.875;
(3(78+3
4)÷18,
=78×8+3
4×8,
=7+6,
=13;
(4)91+91×(2
13-17),
=91+91×2
13-91×17,
=91+14-13,
=92;
(5)2.2×101,
=2.2×(100+1),
=2.2×100+2.2×1,
=220+2.2,
=222.2;
(6)14.6-3.625-6.375,
=14.6-(3.625+6.375),
=14.6-10,
=4.6.
计算下面各题,能简算的要简算。(脱式计算) (6/35+4/21)÷4/7 2/ 50
5楼:匿名用户
(6/35+4/21)÷4/7
=6/35×7/4+4/21×7/4
=3/10+1/3
=9/30+10/30
=19/30
2/9÷2/7÷14/15
=2/9×7/2×15/14
=14/18×15/14
=5/6
(5/6-3/4)÷5/12+4/5
=5/6×12/5-3/4×12/5+4/5=2-9/5+4/5
=2-13/5
=-3/5
3/10÷(4/5-1/2)
=3/10×5/4-3/10×2
=3/8-3/5
=15/40-24/40
=-9/40
2/25÷3/7+23/25÷3/7
=(2/25+23/25)÷3/7
=1×7/3
=2又1/3
8/9÷5/6+1/6
=8/9×6/5+1/6
=16/15+1/6
=32/30+5/30
=37/30
=1又7/30
2/3x=16
x=16×3/2
x=24
3/4x+1/4=3/8
3/4x=3/8-1/4
3/4x=1/8
x=1/8×4/3
x=1/6
1/5x-1/2=3/10
1/5x=1/2+3/10
1/5x=8/10
x=8/10×5x=4
6楼:**防骗
6/35x7/4十4/2lx7/4=3/10十1/3=9/30十10/30=19/30
2/9x7/2x1/14=1/185/6
计算下面各题,能简便计算的用简便方法计算2-
1楼 数学新绿洲 2 6 13 9 26 2 6 13 26 9 2 4 3 2 3 1 3 1 4 36 1 3 36 1 4 36 12 9 21 6 7 4 5 2 3 1 5 6 7 4 5 2 3 5 6 7 4 10 3 6 7 2 3 4 7 3 4 3 4 4 7 9 7 3 4 1...
计算下面各题,能简算的用简便方法计算
1楼 坏少 1 12 5 8 94 0 8 12 5 0 8 8 94 10 8 94 89 4 2 7 4 0 5 7 4 0 5 3 7 14 8 18 5 3 6 8 32 32 3 2 6 8 3 2 32 10 32 320 4 8 1 5 6 0 8 7 75 2 5 0 8 7 75 ...
计算(能简算的要简算)5 7-(2 5)+
1楼 匿名用户 5 7 2 3 2 5 3 2 5 7 4 15 3 2 150 210 56 210 315 210 409 210 225 210 56 210 281 210 3 5 4 7 2 5 3 7递等式计算能简算的要简算 2楼 龚成素 分母相同的分组 3 5 4 7 2 5 3 7 ...