手脑速算教程及练习(11)

42-16+27+29-18=                    37+37-58+41+14=

36+37-38+17+20=                    53+27-68+9+30=

54-18+20+13+19=                    65-38+24-16+9=

56-49+33+10-7=                      15+28+34-9-7=

16+19+45-37+2=                      38+32-50+23+9=

29+28-17+33+20=                     50-31+19+54-87=        

练习十四、十五
一、复习进位加法口诀和退位减法口诀

二、100以内的混合运算练习

39+29-28-17+11=                      87+10-38-37+18=

98-77+42-50+33=                      59+11+23-80+69=

73+17-43-19+18=                      77+22-49-38+17=

59-33+44-17+21=                      85-21-17+34-37=

99-88+27+19-23=                      39+42-63+18-7=

27+46-45+48-23=                      49-34+56+15-34=

54+42-62-6+38=                       68-44+63+15-27=
73+21-59-16+48=                         82-34+41-72+29=

94-53+37-17-8=                          58+32-44+14+8=

27+54-19+23-47=                         38+23-34+28-33=

6+19-8+27-16=                           56+24+19-22-77=

13+58+11-20-17=                         64+18-36+15-30=