B= 123,8 - 34.15 - 12,49 - ( 5,85 - 2,49 ) + 10,2
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a: \(=41.54+8.46-3.18-5.82+23.17-3.17\)
=50-9+20
=70-9=61
b: \(=123.8-34.15-5.85-12.49+2.49+10\)
=123,8-40
=83,8
c: \(=32.18+36.42+13.93-2.18-6.42-3.93\)
=30+30+10
=70
a: \(A=\left(41.54+8.46\right)-\left(3.18+5.82\right)+\left(23.17-3.17\right)\)
=50-9+20
=70-9
=61
b: \(B=123.8-\left(34.15+5.84\right)+\left(-12.49+2.49\right)\)
\(=123.8-40-10=73.8\)
c: \(C=\left(32.18-2.18\right)+\left(36.42-6.42\right)+\left(13.93-3.93\right)\)
=30+30+10
=70
a: A=(41.54+8.46)−(3.18+5.82)+(23.17−3.17)A=(41.54+8.46)−(3.18+5.82)+(23.17−3.17)
=50-9+20
=70-9
=61
b: B=123.8−(34.15+5.84)+(−12.49+2.49)B=123.8−(34.15+5.84)+(−12.49+2.49)
=123.8−40−10=73.8=123.8−40−10=73.8
c: C=(32.18−2.18)+(36.42−6.42)+(13.93−3.93)C=(32.18−2.18)+(36.42−6.42)+(13.93−3.93)
=30+30+10
=70
a) 34.15 + 34.85 = 34.(15+85) = 34.100 = 3400
b) 12.57 + 57.25 + 63.57 = 57.(12+25+63) = 57.100 = 5700
c) 36.28 + 36.82 + 64.69 + 64.41 = 36.(28+82) + 64(69+41) = 36.110 + 64.110 = 110.(36+64) = 11000
d) 2.31.12 + 4.6.42 + 8.27.3 = 24.31 + 24.42 + 24.27 = 24.(31+42+27) = 24.100 = 2400
B = 123,8 - 34,15 - 12,49 - (5,85 - 2,49) + 10,2
B= 123,8 - 34,15 -12,49 - 3,36 + 10,2
B= 84