ldcf.net
当前位置:首页 >> 脱式计算(能简算的要简算)( 1 4 + ... >>

脱式计算(能简算的要简算)( 1 4 + ...

(1)0.125× 1 4 +1.875÷4,=0.125× 1 4 +1.875× 1 4 ,=(0.125+1.875)× 1 4 ,=2× 1 4 ,= 1 2 ;(2)27×99,=27×(100-1),=2700-27,=2673;(3)30.1-16.8÷3.5×6.2,=30.1-4.8×6.2,=30.1-29.76,=0.34;(4) 5 4 ×2.5× 4 5 ×0.4,=(...

(1)44×25,=11×(4×25),根据乘法结合律,=11×100,=1100;(2)(1- 1 4 - 5 12 )÷ 2 3 ,=(1- 3 12 - 5 12 ) ÷ 2 3 ,= 1 3 × 3 2 ,= 1 2 ;(3) 3 5 ×12+ 3 5 ×14- 3 5 ,= 3 5 × (12+14-1),= 3 5 × 25,=15;(4) 4 9 ×[ 3 4 -...

(1)4 5 8 +3.75+5 3 8 +6 1 4 ,=(4 5 8 +5 3 8 )+(6.25+3.75),=10+10,=20;(2)( 1 2 + 1 3 - 2 15 )×30,=30× 1 2 +30× 1 3 - 2 15 ×30,=15+10-4,=21;(3) 7 12 ×[( 2 5 + 1 3 )÷ 2 3 ],= 7 12 ×[ 11 15 ÷ 2 3 ],= 7 12 ×...

(1)2007-6×308 =2007-1848=159(2)1750-999-99-9 =1750-(1000-1)-(100-1)-(10-1)=1750-1000-100-10+3=750-100-10+3=650-10+3=640+3=643(3)0.7+3.9+4.3+6.1=(0.7+4.3)+(3.9+6.1)=5+10=15(4)3.6÷(7.2-4×1.5)=3.6÷(7.2-6)=3.6...

解:1.15小时=1小时9分钟, 4.05吨=4吨50千克, 12小时=30分钟, 4.5分米=4分米5厘米.故答案为:1,9,4,50,30,4,5.

(1)2.5×(1.9+1.9+1.9+1.9),=2.5×(1.9×4),=2.5×4×1.9,=10×1.9,=19;(2)19×99+99,=(19+1)×99,=20×99,=1980;(3)2.5×13×0.4,=(2.5×0.4)×13,=1×13,=13;(4)112÷(14+16),=112÷(312+212),=112÷512,=112×125,=15.

2又6分之1减4分之3减3分之2等于多少? 13/6 - 3/4 - 2/3 = 26/12 - 9/12 -8/12 =(26-9-8)/12 =9/12 =3/4

第一题2-3分之2*5分之3+2分之1÷4分之3 =2-(2/3)×(3/5)+(1/2)×(4/3) =2-2/5+2/3 =2-6/15+10/15 =2+4/15 =2又15分之4; 第二题 【0.25*76+23*25%+4分之1】÷0.01 =(0.25×(76+23+1))÷0.01 =0.25×100÷0.01 =2500; 第三题【3分之1+(5.4-3分之2*3分之2...

如图

(1)17.64÷4.9+6.73=3.6+6.73=10.33(2)5.6×13.9+0.44×139=0.56×139+0.44×139=(0.56+0.44)×139=1×139=139(3)48×1.02÷3.4=48.96÷3.4=14.4(4)0.25×12.5×320=0.25×12.5×8×40=(0.25×40)×(12.5×8)=10×100=1000

网站首页 | 网站地图
All rights reserved Powered by www.ldcf.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com