( 100 x 0,1 - 900 x 0,1 -90 x 0,1 ) x (142 x 0,5 - 240 x 0,25 )
=(10 - 90 - 9 ) x ( 71 - 60 )
= -89 x 11
= -979
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Các câu hỏi tương tự
[1000*0.1-900*0.1-90*0.1]*[142*0.5-240*0.25]
tính nhanh:
1/90:0.25+1/90:0.2+1/90:0.5+1/90:0.125-1/90:0.1
x/0.5+x/0.25+x/0.1=16
150 - 40 × 20 × 5 × 0.5 × 0.25 × 0.2 - 5 - 0.1
Tính nhanh : (792.81* 0.25+ 792.81 * 0.75) * (11*9-900*0.1-9)
1/2:0.5-1/4:0.25+1/8:0.125-1/10:0.1
1/2 : 0.5 - 1/4 : 0.25 + 1/8 : 0.125 - 1/10 : 0.1
1/2:0.5-1/4:0.25+1/8:0.125-1/10:0.1
1/2:0.5-1/4:0.25+1/8:0.125-1/10:0.1