Câu 6 (2 điểm). a) Tinh nhanh: 1325 : 50 + 132,5 : 2,5 + 13,25 : 0,125
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13,25:0,5+13,25:0,25+13,25:0,125+13,25x6
=13,25x2+13,25x4+13,25x8+13,25x6
=13,25x(2+4+8+6)
=13,25x20
=265
13,25:0,5+13,25:0,25+13,25:0,125+13,25x6
=13,25x2+13,25x4+13,25x8+13,25x6
= 13,25x(2+4+8+4)
=13,25x20
=265
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Bài 2:
a: =47,4+47,4x4=47,4x5=237
b: =(0,26+0,74)+(0,41+0,59)=1+1=2
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a: =72,5*13,5-61,5-13,6-13,6
=978,75-61,5-27,2
=890,05
b: =132,5(2+4+8+6)
=132,5*20=2650
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= 13,25 x 2 + 13,25 x 4 + 13,25 x 8 + 13,25 x 6
= 13,25 x ( 2+4+8+6)
= 13,25 X 20
=265
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\(13,25:0,5+13,24:0,25+13,25:0,125\)
\(=13,25\times2+13,24\times4+13,25\times8\)
\(=13,25\times\left(2+8\right)+13,24\times4\)
\(=13,25\times10+52,96\)
\(=132,5+52,96\)
\(=185,46\)
CHÚC BN HỌC TỐT!!
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13,25 : 0,5 + 13,25 : 0,25 + 13,25 : 0,125 + 13,25 × 6
= 13,25 x 2 + 13,25 x 4 + 13,25 x 8 + 13,25 × 6
= 13,25 x (2 + 4 + 8 + 6)
= 13,25 x 20
= 265
13,25 : 0,5 + 13,25 : 0,25 + 13,25 : 0,125 + 13,25 × 6
= 13,25 : 2 + 13,25 : 4 + 13,25 : 8 + 13,25 × 6
= 13,25 : (2 + 4 + 8 + 6)
= 13,25 : 20
= 265
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