Toán Lớp 5: 1 phần 90 chia 0,25+ 1 phần 90 : 0,2+ 1 phần 90 : 0,125 – 1 phần 90 : 0,1
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Toán Lớp 5: 1 phần 90 chia 0,25+ 1 phần 90 : 0,2+ 1 phần 90 : 0,125 – 1 phần 90 : 0,1
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$\text{$\dfrac{1}{90}$ : 0,25 + $\dfrac{1}{90}$ : 0,2 + $\dfrac{1}{90}$ : 0,125 – $\dfrac{1}{90}$ : 0,1}$
$\text{= $\dfrac{1}{90}$ × 4 + $\dfrac{1}{90}$ × 5 + $\dfrac{1}{90}$ × 8 – $\dfrac{1}{90}$ × 10}$
$\text{= $\dfrac{1}{90}$ × ( 4 + 5 + 8 – 10 )}$
$\text{= $\dfrac{1}{90}$ × 7}$
$\text{= $\dfrac{7}{90}$}$