Toán Lớp 5: 18 : 0,5 x24 + 6 : 0,25 x14 +0,5 x76 x 100
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Toán Lớp 5: 18 : 0,5 x24 + 6 : 0,25 x14 +0,5 x76 x 100
Comments ( 1 )
18 : 0,5 x 24 + 6 : 0,25 x 14 + 0,5 x 76 x 100
= 18 : $\dfrac{1}{2}$ × 24 + 6 : $\dfrac{1}{4}$ × 14 + $\dfrac{1}{2}$ × 76 × 100
= 18 × 2 × 24 + 6 × 4 x 14 + $\dfrac{1}{2}$ × 76 x 100
= 36 × 24 + 24 × 14 + 76 x 100 : $\dfrac{1}{2}$
= 24 x ( 36 + 14) + 76 x 100 : 2
= 24 × 50 + 76 × 50
= (24 + 76) x 50
= 100 x 50
= 5000