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√1⁹/₁₆ × (-2)² + 1,2 × ⁵/₁₂ =
√25/16*4+12/10*5/12=
5/4+0,2=
1,25+0,2=
1,45
b)
2½ - ½ × ∛3⅜ + 2⁻¹ =
2,5-0,5*∛27/8 +0,5=
2,5-0,5*3/2+0,5=
2,4-0,75+0,5=
2,15
c)
(¾)⁻¹ -(-1⅓)² ÷ 0,9 =
4/3-16/9:0,9=
4/3-16/9*10/9=
4/3-160/81=
108/81-160/81=
-52/81
d) 0,8 × 3/2³ - (-2)³/4 × 0,1 =
0,8*3/8+8/4*0,1=
0,3+2*0,1=
0,3+0,2=
0,5
e)
(1⅓)² × (-⅓)⁻² - 1,9⁰ × 3⁻¹ =
16/9*9-1*1/3=
16-1/3=
15i2/3