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a: =15+11,2=26,2
b: =-3
c: =-1,9-0,02=-1,92
d: =103-96-0,08=7-0,08=6,92
e: =15-0,99=14,01
f: -0,707+2,3=1,593
p: =8,26-25,14-8,26=-25,14
q: =-5,4(3,6+6,4)
=-5,4*10=-54
o: =12,7+(-7)
=5,7
m: =19,7-9=10,7
\(=\left(-1.4\right)\cdot3.8-38.4\cdot2-17.88=-100\)
f: =49*51-49*4-51*49-51*4
=-49*5-51*4
=-4*100=-400
h: =41(-328+128)
=-41*200
=-8200
a: =22+25,5=47,5
b: \(=-9.207-1.503+3,8-28=-10,71-28+3,8\)
=-34,91
c: =-12,5-3,5+17,55+2,45
=20-16=4
d: =2,07+1,03-7,36-7,64+8,97=3,1-15+8,97=-2,93
e: =2,07+4,23+3,005-12,005
=6,3-9=-2,7
f: \(=4,35-2,67+1,65+3,54-6,33=6-9+3,54=3,54-3=0,54\)
a) 32 - (-1,6) = 32 + 1,6 = 33,6
b) (-0,5). 1,23 = -0,615
c) (-2,3) + (-7,7) = -(2,3 +7,7)= -10
d) 0,325 - 3,21 = -(3,21-0,325) = -2,885
a ) 2 5 7 .4 1 5 = 19 7 . 21 5 = 57 5 . b ) 6 5 8 : 2 7 4 = 53 8 : 15 4 = 53 30
c ) 6 7 8 . − 2 14 9 = 55 8 . − 32 9 = − 220 9
d ) 1 7 8 : − 4 1 4 = 15 8 : − 17 4 = − 15 34
e ) − 4 2 9 . − 5 1 2 = − 38 9 . − 11 2 = 209 9 f ) − 2 8 9 : − 4 1 3 = − 26 9 : − 13 3 = 26 39 g ) 3 6 5 .2 = 3 + 6 5 .2 = 3.2 + 6 5 .2 = 6 + 12 5 = 42 5 h ) 5 4 7 : 2 = 5 + 4 7 : 2 = 5 2 + 2 7 = 39 14
a, 39.47 – 39.17
= 39.(47 – 17)
= 39.30
= 1170
b, 12.53 + 53.172 – 53.84
= 53.(12+172 – 84)
= 53.100
= 5300
c, 53.27 – 53.17
= 53.(27 – 17)
= 53.10
= 530
d, 33.59 + 59.151 – 59.84
= 59.(33 + 151 – 84)
= 59.100
= 5900
e, 29.63 – 29.13
= 29.(63 – 13)
= 29.50
= 1450
f, 91.2018 – 45.2018 – 46.2018
= 2018.(91 – 45 – 46)
= 2018.0
= 0
a) \(34,62+11,23=45,85\)
b) \(53,16-21,08=32,08\)
c) \(3,82+1,91+7,43=12,,16\)
d) \(40,25+11,38-22,17=29,46\)
e) \(1.6+\left(-4,2\right)=1,6-4,2=-2,6\)
f) \(\left(-3,8\right)+\left(-4,6\right)=-8,4\)
q) \(1,5\cdot3,1=4,65\)
h) \(162\cdot0,5=81\)