计算下面各题,能简算的要简算.236-36÷213×34÷(34-512)815×[56÷(79-13)]9.6-1.17-5.83(45-17)×352015×0.25+2015×0.75.
计算下面各题,能简算的要简算.
236-36÷2
×÷(-)
×[÷(-)]
9.6-1.17-5.83
(-)×35
2015×0.25+2015×0.75.
答案和解析
(1)236-36÷2
=236-18
=218;
(2)
×÷(-)
=×÷
=÷
=;
(3)×[÷(-)]
=×[÷]
=×
=1;
(4)9.6-1.17-5.83
=9.6-(1.17+5.83)
=9.6-7
=2.6;
(5)(-)×35
=×35-×35
=28-5
=23;
(6)2015×0.25+2015×0.75
=2015×(0.25+0.75)
=2015×1
=2015.
pa=0.5,pb=0.3,pab=0.1求p(aUb),答案是0.5+0.3-0.1=0.7我. 2020-04-12 …
S1=(6.5+2+15.5+3+15+8.5)*88+(37.5+30)*43/2+(37+46 2020-06-13 …
matlab输出结果精度问题!急!clear; A=[4.7000000 24.5 24.1 10 2020-06-27 …
口算3.6÷1.8=4.71-0.8=2.5-2.5÷5=0÷3.15=0.175÷0.25÷4= 2020-07-18 …
直接写数对又快66+8=3.8+6.2=49×38=47-8=3.8÷0.19=12÷37=56÷ 2020-07-19 …
直接写出计算结果.1.7×0.5=4÷0.8=5.6-2.3=0.125×4=1.44÷1.2=3 2020-07-26 …
判断下列各对直线是否垂直:(1)y=x,2x+2y-7=0(2)x+4y-5=0,4x-3y-5= 2020-08-01 …
1.在数轴上表示下列各数:负5,正3,负3.5,0,3分之2,负2分之3,0.75.2.在数轴1.在 2020-11-20 …
口算能手.42×20=25×40=810÷3=3.5+6.5=21×30=600÷6=4.2-1.2 2020-12-08 …
负2减负9+3-负1=?7.2-3.6+负3.6-负2.5=?0-1+2-3+4-5=?4.5-2. 2021-01-14 …