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7,29+34,937=42,227
16,52-5,214=11,306
23,05x3,5=80,675
91,08:3,6=25,3
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a ) 7,44 : 6 c) 1904 : 0,8
= 1,24 = 2380
b) 47 . 5 : 0,25 d) 20,65 : 3,5
= 235 : 0,25 = 5,9
= 940
Học tốt !
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a)3,5*45+3,5*54+3,5
=3,5*(45+54+1)
=3,5*100
=350
b)0,2+2,3+3,5-3,6-0,4
=(0,2+2,3+3,5)-(3,6+0,4)
=6-4
=2
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(1+2+3+...+20)+0.5*20
=(1+20)*10+10
=210+10
=220
cha biet dung khong nua
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23,05 x 3,5 = 80,675
23,05 x 3,5 = 80,675
học tốt!!