1.4×2.5-1.95÷0.65 1.7×0.8×1.25 2.5×7.3+1.7×2.5+2.5 27×9.9
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/20 01:08:17
1.4×2.5-1.95÷0.65 1.7×0.8×1.25 2.5×7.3+1.7×2.5+2.5 27×9.9
急
急
1.4×2.5-1.95÷0.65
=(1+0.4)*2.5-1.95*100/65
=1*2.5+0.4*2.5+3
=2.5+1+3
=6.5
1.7×0.8×1.25
=1.7*(0.8*1.25)
=1.7*1
=1.7
2.5×7.3+1.7×2.5+2.5
=2.5*(7.3+1.7+1)
=2.5*10
=25
27×9.9
=27*(10-0.1)
=27*10-27*0.1
=270-2.7
=267.3
=(1+0.4)*2.5-1.95*100/65
=1*2.5+0.4*2.5+3
=2.5+1+3
=6.5
1.7×0.8×1.25
=1.7*(0.8*1.25)
=1.7*1
=1.7
2.5×7.3+1.7×2.5+2.5
=2.5*(7.3+1.7+1)
=2.5*10
=25
27×9.9
=27*(10-0.1)
=27*10-27*0.1
=270-2.7
=267.3
1.4×2.5-1.95÷0.65.12.5×0.8+587×12×0这两道题里那几道可以简便计算
4(x+0.8)=7.2 (x-1.8)÷4=2.5 5(x-6.5)=1.7
2.5×(1.7+1.7+1.7+1.7) 简算
2.5×1.7+0.25×83用简便计算怎么算
规律0.8,1.7,2.5,4.2,(),10.9
1,(-1.7)-(-2.5)
脱式简便算法:0.45*101-0.45 2.5*0.99 0.85/0.5/1.7 (14.6+1.4)*0.8
0.8,1.7,2.5,4.2,(),10.9的规律
2.5-2.5×0.8简算
能简算的要简算.10.2-(1.25+2.5)÷1.5 480÷16×1
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三道简便计算0.65×13+89×65% 36÷11+52 (0.36+0.36+0.36+0.36)×2.5