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a) 23.56 + 56.77 = (23 + 77).56 = 100.56 = 5600.
b) 32.19 + 32 = 32.(19 +1) = 32.20 = 640.
c) 35.34 + 35.86 + 65.75 + 65.45 = 35.(34 + 86) + 65.(75 + 45)
= 120.35+120.65 -120.(35 + 65) = 12000.
d) 43.17 + 29.57 +13.43 + 57 = 43.(17 +13) + 57.(29 +1)
= 43.30 + 57.30 = 30. (43+57) = 3000.
e) 3.25.8 + 4.37.6 + 2.3812 - 24.25 + 24.37 + 24.38
= 24.(25 + 37 + 38) = 2400.
f) 64.16 + 81.84+17.16 = 16.(64+17)+81.84 = 16.81+81.84
= 81.(16 + 84) = 8100
a) 23.56 + 56.77 = (23 + 77).56 = 100.56 = 5600.
b) 32.19 + 32 = 32.(19 +1) = 32.20 = 640.
c) 35.34 + 35.86 + 65.75 + 65.45 = 35.(34 + 86) + 65.(75 + 45)
= 120.35+120.65 -120.(35 + 65) = 12000.
d) 43.17 + 29.57 +13.43 + 57 = 43.(17 +13) + 57.(29 +1)
= 43.30 + 57.30 = 30. (43+57) = 3000.
e) 3.25.8 + 4.37.6 + 2.3812 - 24.25 + 24.37 + 24.38
= 24.(25 + 37 + 38) = 2400.
f) 64.16 + 81.84+17.16 = 16.(64+17)+81.84 = 16.81+81.84
= 81.(16 + 84) = 8100
\(43\cdot17+29\cdot57+13\cdot43+57\)
\(=43\cdot\left(17+13\right)+57\cdot\left(29+1\right)\)
\(=43\cdot30+57\cdot30\)
\(=30\cdot\left(43+57\right)\)
\(=30\cdot100\)
\(=3000\)
43.17+29.57+13.43+57
=43.17+29.57+13.43+57.1
=43.(17+13)+57.(29+1)
=43.30+57.30
=30.(43+57)
=30.100
=3000
43.17 + 29.57 +13.43 + 57 = 43.(17 +13) + 57.(29 +1)
= 43.30 + 57.30 = 30. (43+57) = 3000
\(43.17+29.57+13.43+57\\ =43.\left(17+13\right)+57.\left(29+1\right)\\ =43.30+57.30\\ =30.\left(43+57\right)\\ =30.100\\ =3000\)
chúc bạn học tốt !!!
43.17+29.57+13.43+57
=43.17+29.57+13.43+57.1
=43.(17+13)+57.(29+1)
=43.30+57.30
=30.(43+57)
=30.100
=3000
\(43.17+29.54+13.43+54\)
\(=43.\left(17+13\right)+54.\left(29+1\right)\)
\(=43.30+54.30\)
\(=30.\left(43+54\right)\)
\(=30.97\)
\(=2910\)
\(\text{43.17+29.57+13.43+57}\)
\(=43.\left(17+13\right)+57.\left(29+1\right)\)
\(=43.30+57.30\)
\(=30.\left(43+57\right)\)
\(=30.100\)
\(=3000\)
Học tốt
43.17+29.57+13.43+57
= 43.17 + 13.43 + 29.57 + 57
= 43 ( 17 + 13 ) + 57 ( 29 + 1 )
= 43 . 30 + 57 . 30
= 30 ( 43 + 57 )
= 30 . 100
= 3000
43.17+29.57+13.43+57
=43.(17+13)+57.(29+1)
=43.30+57.30
=30.(43+57)
=30.100=3000
\(43.17+29.57+13.43+57\)
\(=43.\left(17+13\right)+57.\left(29+1\right)\)
\(\text{= 43.30 + 57.30}\)
\(=30.\left(47+57\right)\)
\(=30.100\)
\(=3000\)
Hok tốt !
a, Ta có : 32.19+32=32.(19+1)
=32.20
=640