1.-3/4×(8-1又1/3-14/15)
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/24 14:50:48
1.-3/4×(8-1又1/3-14/15)
2.(-5)×3/13+(-5)×(-2/13)-5×1/13×(-14/13)×(-8)
3.9又18/19×19
2.(-5)×3/13+(-5)×(-2/13)-5×1/13×(-14/13)×(-8)
3.9又18/19×19
1.-3/4x(8-1又1/3-14/15)
=-3/4X8-(-3/4X4/3)-(-3/4X14/15)
=-2/3+1+7/10
=31/30
2.(-5)×3/13+(-5)×(-2/13)-5×1/13×(-14/13)×(-8)
=(-5X3+5X2-5X1+14X8)/13
=102/13
3.9又18/19×19
=(9x19+18)/19x19
=189
=-3/4X8-(-3/4X4/3)-(-3/4X14/15)
=-2/3+1+7/10
=31/30
2.(-5)×3/13+(-5)×(-2/13)-5×1/13×(-14/13)×(-8)
=(-5X3+5X2-5X1+14X8)/13
=102/13
3.9又18/19×19
=(9x19+18)/19x19
=189
(1又2/3+2又3/4+~+7又8/9+8又9/10)除以(3又1/3+5又2/4+7又3/5+~+15又7/9+17
1 又1/2+3又1/4+5又1/8+7又1/16+9又1/32+11又1/64+13又1/128+15又1/256+1
(9又11分之8-3又14分之5-1又14分之9)×2又4分之3
(9又8/11-3又5/14-1又9/14)×2又4/3
9又14/25×(-15)-(2.5+1/8-3又1/2+1又7/8).
1.求1又1/2-2又5/6+3又1/12-4又19/20+5又1/30-6又41/42+7又1/56-8又71/72+
2又3分之+4又15分之1+6又35分之1+8又63分之1
15-30又1/4/2又1/5+1又5/21*8又3/5
(1又4/5-2又5/6+3又7/10-4又8/15)/(-1/30)
8又1/5-3又3/10+1又4/15
小学数学题 简便计算7+4又1/3-4又2/15+5又1/20-3又11/28+8又4/77
1又2分之1+2又4分之1+3又8分之1+4又16分之1...+10又1024分之1