分数的混合运算计算题
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1.老师在黑板上写了13个自然数,让小王计算平均数(保留两位小数),小王计算出的答案上12.43.老师说最后一位数字错了,其他的数字都对.请问正确的答案应该是________. 2.老王的体重的2/
五年级计算题练习1.、3/7×49/9-4/32.、8/9×15/36+1/273.、12×5/6–2/9×34.8×5/4+1/45.、6÷3/8–3/8÷66.、4/7×5/9+3/7×5/97.
1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-(3/2+4/5)
1.125*3+125*5+25*3+252.9999*3+101*11*(101-92)3.(23/4-3/4)*(3*6+2)4.3/7×49/9-4/35.8/9×15/36+1/276.12×
http://wenku.baidu.com/view/985577f57c1cfad6195fa7c4.html这里面全是初一有理数的混合运算习题,不带答案的
1.125*3+125*5+25*3+252.9999*3+101*11*(101-92)3.(23/4-3/4)*(3*6+2)4.3/7×49/9-4/35.8/9×15/36+1/276.12×
1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-(3/2+4/5)
3/7×49/9-4/38/9×15/36+1/2712×5/6–2/9×38×5/4+1/46÷3/8–3/8÷64/7×5/9+3/7×5/95/2-(3/2+4/5)7/8+(1/8+1/9)9
一5*(30\15)=5*2=10二25*3\15=75\15=5三14\7*19+2=2*19+2=38+2=40四1*2*3*4\12=24*12=2五(6\3*23-21)*(27\9+35\7
(1)原式=1-0.5×0.2×3.75=1-0.375=0.625(2)原式=-1-1/2×1/3×(2-9)=1-1/6×(-7)=1+7/6=13/6再问:(2)一开始不是-1吗到后面怎么变成1
(1)[1/3×5.8-(31+56)]÷9999(2){[987-789÷(555-159)]×5.7-6.9}×12(3)987.84-(278+322)÷151406+735×9÷453168-
.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-(3/2+4/5)8
1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-(3/2+4/5)
1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+2又1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-(3/2+4/
(4又5/6-3又3/4)/(3/14+2/7)=13/12÷1/2=13/6=2又1/6(4.8/1又4/5+3又1/2+7又1/3)*4/9=(2又2/3+7又1/3+3.5)*4/9=(10+3
1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-(3/2+4/5)
1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-(3/2+4/5)
1.125*3+125*5+25*3+252.9999*3+101*11*(101-92)3.(23/4-3/4)*(3*6+2)4.3/7×49/9-4/35.8/9×15/36+1/276.12×