hiệu 2 số là:
20,08-7,8+15,4= 27,68
đáp số:...
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Tim hieu cua hai so , biet rang neu them vao so lon 15,4 va them vao so be 7,8 thi duoc hieu cua hai so moi la 20,08
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Bai 1 : Tong cua hai so la 2000. Neu so hang thu nhat them 135 don vi va so hang thu hai bot 531 don vi thi duoc tong moi la bao nhieu?
Bai 2 : Tim tong hai so biet rang neu so hang thu nhat bot di 246 don vi va so hang thu hai them 642 don vi thi duoc tong moi bang 2010.
Bai 3 : Hieu cua hai so la 1000. Neu so lon them 235 don vi va so be bot 200 don vi thi duoc hieu moi la bao nhieu?
Bai 4 : Hieu cua hai so bang 1234. Neu so lon bot 234 don vi va so be them 456 don vi thi duoc hieu moi la bao nhieu?
Bai 5 ; Tim hieu cua hai so, biet rang so lon va so be cung bot di 100 don vi thi duoc hieu moi la 1000.
tinh 44,5-4,5-3,5-2,5=
tinh a) 25-3,5*1,5= b) 25,7-4,5+1,5*6,12=
tim x biet 3,45-2,5+ x = 1,78 12,3- x +4,5 = 2,3=
tim hieu cua hai so biet rang neu so lon them 15,4 va so be them 7,8 thi duoc hieu hai so moi bang 20,08
cac ban hay giup minh lam chinh xax voi minh can trong chieu hom nay la ngay 19-11-2017 minh cam on cac baqn
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