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

\(1.33,6\\ 2.-0,615\\ 3.-10\\ 4.-2,885\)

chính xác 

Lời giải:
$(2,41+3,12)\times 2,2=5,53\times 2,2=12,166$

$(5,6-3,21)\times 2,3=2,39\times 2,3=5,497$

$3,276:1,4+7,66=2,34+7,66=10$

$28,886:1,3+77,78=22,22+77,78=100$

a: =32+1,6=33,6

b: =-0,5x1,23=-0,615

c: =-2,3-7,7=-10

d: =0,325-3,21=-2,885

= 2,46

k cho mình nha

thank you

a/\(0,25\times611,7\times4\)
\(=\left(0,25\times4\right)\times611,7\)
\(=1\times611,7\)
\(=611,7\)
b/\(17,6\times3,21+3,21\times42,4+3,21\times40\)
\(=3,21\times\left(17,6+42,4+40\right)\)
\(=3,21\times100\)
\(=321\)
#kễnh

a) 0,25 x 611,7 x 40

=0,25 x 40 x 611,7

=10 x 611,7

=6117

b) 17,6 x 3,21 + 3,21 x 42,4 +3,21 x 40

= 3,21 x ( 17,6+42,4+40)

=3,21 x (60+40)

=3,21 x 100

=321

a, 0,25*611,7* 40

=(0,25* 40)* 611,7

=10*611,7

=6117

b, 17,6*3,21+3,21*42,4+3,21*40

=3,21* ( 17,6+42,4+40)

= 3,21*100

=321

(-1,32- 23/7) - ( 6,68 + 5/8 - 2/7)

=\(\frac{-806}{175}\)- \(\frac{8877}{1400}\)

=\(\frac{-613}{56}\)

(-1/32 - 23/7) - (6,68 + 5/8 - 2/7)

= -1,32 - 23/7 - 6,68 - 5/8 + 2/7

= (-1,32 - 6,68) - (23/7 - 2/7) - 5/8

= -8 - 3 - 5/8

= -11 - 5/8

= -93/8