北师大版二年级数学上册练习一ppt课件.ppt

练 习 一,课件,我会算。,56+21+18=,95,96-34-35=,27,48+32-16=,64,连加,连减,加减混合,它们的运算顺序都是从左往右算。,46+34+16=（个）,96,80-25-39=（个）,16,西瓜子的粒数,课件,100-23-40=（元）,37,100-23-15=（元）,62,45+40+15=（元）,100,85+15=（元）,100,89,52,24,88,22,100,36+18+45=（根）,99,36+18-10=（根）,44,36+18=（根）,54-10=（根）,54,44,95-32-36=（节）,27,32+36-23=（节）,45,90-24-30=（下）,36,91-26-30=（下）,35,94-29-29=（下）,36,36,36,91,35,92-26-30=（下）,36,92,36,93-26-30=（下）,37,93,37,课件,聪明屋！,8,30-12-10=,8,30-13-8=,9,9,11,30-10-9=,11,7,12+10+()=30,14,6,课件,