数学暑假作业一、 连加12 + 25+ 6= 42+23+11= 80+12+0=35+18+7= 54+13+9= 33+7+15=16+13+29= 18+19+43= 63+18+15=28+14+32= 12+29+14= 48+9+11=76+16+5= 26+37+23= 9+17=25=67+13+9= 46+13+8= 57+23+13=39+17+11= 8+15+34= 56+22+14=二、 连减75-28-2= 43-18-11= 67-18-25= 73-48-14=59-16-9= 76-34-13= 89-42-13= 48-26-7=87-35-8= 85-16-0= 84-61-23= 55-17-7=99-78-5= 68-24-5= 76-34-12= 48-32-3=100-99-1= 68-45-8= 82-16-13= 87-27-14=三、 混合运算题37-34+76= 31+64-57= 92-55+32=36+63-86= 92-87+95= 10+35-26= 77-42+23= 49+22-54= 52+41-93= 51+46-48= 97-54+43= 72-64+50= 90-44+10= 90-76+37= 77-17+4= 7+73-78= 0-7+23= 62+30-68= 四、 混合运算题35+(25-20)= 10+(50+50)= 53-(30-20)= 52-(12+8)= 20+(12+18)= 24-(45+55) =23+(25-12 ) = 16- (15+5) = 34+(12-2) = 78+(56-16) = 51 - (62-39)= 73 - (37+38)= 29 + (36-29)= 90 - (13+68)= 96 - (87-48)= 6 - (39+17)= 75 - (1