浙教版一年級(jí)上冊(cè)數(shù)學(xué)《三個(gè)數(shù)的加減》練習(xí)題

字號(hào):

4+28+40=
    60+30-7=
    25+(30-10)=
    17+(15-5)=
    46-(17-8)=
    40+(36-10)=
    50+14+20=