-112-12= -109+99=
145-880= 345-678=
-11-23= -44+12=
90-144= -909+12=
23-34= -344+122=
666-901= 34-99=
-88-455= -89+234=
233-8888= 12-67=
-890-2= 33-78=
这些算术就是要多练!
负数的加减法题目.越多分越多.最好加法和减法的题目量一样. 要写清楚!
-112-12= -109+99=
145-880= 345-678=
-11-23= -44+12=
90-144= -909+12=
23-34= -344+122=
666-901= 34-99=
-88-455= -89+234=
233-8888= 12-67=
-890-2= 33-78=
这些算术就是要多练!