Oblicz wartości podanych wyrażeń arytmetycznych .
Obliczenia :
2^2 - 7 x 1/24 - 16 x 1/8
( 3/8 + 1/8 ) x 5
10 x ( 1/5 - 0,1 )
10 x (0,1 + 1/5 )
dopasuj te działania do tych wyników :
2
3
0,5
1
2,5
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2^2-7x1/2 = 4-7x1/2=4-3,5= 0,5
4-16x1/8=4-2= 2
(3/8+1/8)x5=1/2x5= 2,5
10x(1/5-0,1)=10x0,1= 1
10x(0,1 + 1/5)=10x0,3= 3
2^2 - 7 x 1/2 = 4 - 3,5 = 0,5 = 1/2
4 - 16 x 1/8 = 4 - 2 = 2
( 3/8 + 1/8 ) x 5 = 4/8 * 5 = 1/2 * 5 = 2,5
10 x ( 1/5 - 0,1 ) = 10 * (1/5 - 1/10) = 10 * (2/10 - 1/10) = 10 * 1/10 = 1
10 x (0,1 + 1/5 ) = 10 * (1/10 + 1/5) = 10 * (1/10 + 2/10)= 10 * 3/10 = 3
pozdrawiam.