Toán Lớp 7: Tính
a √(-7) ² + √ $\frac{25}{16}$ – $\frac{3}{2}$
b $\frac{1}{2}$x √100- √ $\frac{1}{16}$+ (
$\frac{1}{3}$) $^{0}$
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Toán Lớp 7: Tính
a √(-7) ² + √ $\frac{25}{16}$ – $\frac{3}{2}$
b $\frac{1}{2}$x √100- √ $\frac{1}{16}$+ (
$\frac{1}{3}$) $^{0}$
Comments ( 2 )
= 7 + |5/4| – 3/2
= 1/2 . 10 – \sqrt{(1/4)^2}+ 1
= 5 – 1/4 + 1
$\sqrt{(-7)}$ $^{2}$ + $\sqrt{}$ $\frac{25}{16}$ – $\frac{3}{2}$
= $\sqrt{49}$ + $\frac{5}{4}$ – $\frac{3}{2}$
= 7+$\frac{5}{4}$ – $\frac{3}{2}$
=$\frac{27}{4}$
b)$\frac{1}{2}$ x $\sqrt{100}$ – $\sqrt{}$ $\frac{1}{16}$ + ($\frac{1}{3}$) $^{0}$
= $\frac{1}{2}$ x 10 – $\frac{1}{4}$ +1
=$\frac{23}{4}$