Đáp án:
Giải thích các bước giải:
Bài3
a, 15,27.4,18-2,09
=1527/100×418/100-209/100
=638286/10000-20900/10000
=617386/10000
b,60-26,75-13,25
=6000/100-2675/100-1325/100
=3325/100-1325/100
=2000/100
=20
c,38,25-18,25+21,64-11,64+9,93
=3825/100-1825/100+2164/100-1164/100+993/100
=(3825-1825+2164-1164+993)/100
=3993/100
d,42,28+52,17-15,28-12,17
=4228/100+5217/100-1528/100-1217/100
=(4228/100-1528/100)+(5217/100-1217/100)
=27+40
=67
e=(72,69+18,47)-(8,47+22,69)
=72,69+18,47-8,47-22,69
=(71,69-22,69)+(18,47-8,47)
=49+10
=59
Xin hay nhất
