文档介绍：一年级下册带括号的口算245+(6+4)=        74+(9-5)=         15-(6-4)=        29+(3+17)=        44+(6-4)=         27+(8+12)=       88+(9+1)=        9+(32-2)=        46+(4+5)=         35-(15-10)=37+(5+5)=        16+(8-4)= 35+(8+12)=        74-(9+5)=         35+(6+14)=         55+(7+5)=        57-(9-3)=48-(7-3)=       56+(6-6)=         34+(7-3)=         82+(9-3)=        57-(17-10)=32-(9+3)=        86+(4+10)=         45-(5+9)=         67+(8-6)=        36+(18-5)=  84+(19-5)=        69+(26-20)=       8+(72-2)=        4+(38-8)=        7+(64-24)=45-(16-9)=       7+(36-6)=         74+(8+5)=         9+(33-3)=       54+(9-5)=6+(55-5)=        39+(15-10)=         6+(54 -24)=         9+(25-5)=        44-(8+6)=49+(5+5)=        42+(50+5)=        7+(57-4)=         8+(33-13)=        9+(22-2)=  49-(26-20)=64+(46-40)=        47-(4-4)=         4+(36-30)=         59+(28-25)=        82-(9-0)= 47+(65-25)=       3+(87-20)=         29+(9-3)=         23+(9-5)=      49-(36-6)=67+(25-20)=        39+(4-1)=                76+8=        53+9=67+30=       9+74=         44+6=         14+9=        86+7=45+6=       87+8=         24+6=        5+66=         2+78=42+8=       45+6=         34+8=         35+7=        60+18=61+9=      8+57=        7+34=         73+7=         4+69=55+9=      23+7=        65+10=        78+2=        2+69=35+9=       20+60=        80+10=        32+8=        69+3= 36+9=       8+41=         54+8=