Đáp án + Giải thích các bước giải:
`19.64+76.34`
`=19.2.32+38.2.34`
`=38.32+38.68`
`=38.(32+68)`
`=38.100`
`=3800`
`---`
`35.12+65.13`
`=35.12+65.(12+1)`
`=35.12+65.12+65`
`=12.(35+65)+65`
`=12.100+65`
`=1200+65`
`=1265`
`---`
`136.68+16.272`
`=136.68+16.2.136`
`=136.68+32+136`
`=136.(68+32)`
`=136.100`
`=13600`
`---`
`(2+4+6+...+100).(36.333-108.111)`
`=(2+4+6+...+100).(36.3.111-108.111)`
`=(2+4+6+...+100).(108.111-108.111)`
`=(2+4+6+...+100).0`
`=0`
`---`
`1990.1990-1992.1988`
`=1990.1990-(1990+2).1988`
`=1990.1990-1988.1990-1988.2`
`=1990.(1990-1988)-1988.2`
`=1990.2-1988.2`
`=2.(1990-1988)`
`=2.2`
`=4`
`---`
`19991999.1998-19981998.1999`
`=1999.10001.1998-1999.10101.1998`
`=0`
`---`
`(124.237+152):(870+235.122)`
`=(29388+152):(870+28670)`
`=29540:29540`
`=1`
`---`
`(1374.57+687.86):(26.13+74.14)`
`=(1374.57+687.2.43):[26.13+74.(13+1)]`
`=(1374.57+1374.43):[26.13+74.13+74]`
`=[1374.(57+43)]:[13.(26+74)+74]`
`=[1374.100]:[13.100+74]`
`=137400:1374`
`=100`
