手脑速算教程及练习(12)

26+73-89+40+45=                         62+30-83+9+28=

35-17+14+60-92=                         53-43-10+77-44=

86+13-44-55+27=                         61+38-87+15+39=

12+27+38-40+21=                         66+22-58+13-10=

67+17-84+50+45=                         60-42+58+12-70=

88-79+29+50-32=                         65-49+24+9-30=

80-62+52+13+11=                         81-27-37+9+1=

83-72+55+11-38=                         65-38+21+27-9=

3+6+88-89+50=                           7+8+9+10-20=

57-46+6-9+51=                           33-29+8+15+30=

91-46+45-63+11=                         22+44+33-88-11=

56-38+19+20-15=                         36+38-69+50+10=

45+48-63+33+29=                         55-19+30-8+20=

练习十六
一、综合复习加减法口诀

二、100以内的混合练习
28+44+37-52-41=                          36+8+25-34-4=

29+29-26-13+79=                          57+29-46+23-8=

48+38-64+15-3=                           99-88+54-53+18=

57+27-23+17-45=                          59-34+29-23+28=