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a,43.27 + 93.43+ 57.61 + 59.57
=43.(27+93)+57.(61+59)
=43.120+57.120
=(43+57).120
=100.120
=12000
b,16.41 + 37.34 + 11.41 + 25.37
=41.(16+11)+37.(34+25)
=41.27+37.59
=1107+2183
=3290
c,23.39 + 58.35 + 25.39 +26.58
=(23+25).39+58.(35+26)
=48.39+58.61
=1872+3538
=5410
d,36.6 + 6.37 + 31.73 + 73.23
=(37+36).6 + (31+23).73
=73.6 + 54.73
=73.(6+54)
=73.60
=133
**** nhes
e,64.6 + 81.4 + 17.6
a,43.27 + 93.43+ 57.61 + 59.57
=43.(27+93)+57.(61+59)
=43.120+57.120
=(43+57).120
=100.120
=12000
b,16.41 + 37.34 + 11.41 + 25.37
=41.(16+11)+37.(34+25)
=41.27+37.59
=1107+2183
=3290
c,23.39 + 58.35 + 25.39 +26.58
=(23+25).39+58.(35+26)
=48.39+58.61
=1872+3538
=5410
d,36.6 + 6.37 + 31.73 + 73.23
=(37+36).6 + (31+23).73
=73.6 + 54.73
=73.(6+54)
=73.60
=133
`34,65+21,78+65,35+78,22`
`=(34,65+65,35)+(21,78+78,22)`
`=100+100=200`
`b)4,5xx5,5+4,7xx4,5`
`=4,5xx(5,5+4,7)`
`=4,5xx10,2`
`=4,5xx(10+0,2)`
`=4,5xx10+4,5xx0,2`
`=45+0,9=45,9`
`c)7,25xx2,5xx4`
`=7,25xx(2,5xx4)`
`=7,25xx10=72,5`
a. 678 - x = 56 + 79
678 - x = 135
x = 678 - 135
x = 543
b. Sai đề rùi bn ơi
= 34x(23+25+52)
= 34x100
= 3400
= 78x(34+22+44)
= 78x100
= 7800