①53+27=
②90-65=
③77-7=
④6+78=
⑤85-38=
⑥51-15=
63-7= 73-8= 65-6= 47+30=
38-13= 28+50= 49+20= 19-6=
20+43= 48-30= 65-60= 35+8=
25+(42-30)= 90-50+42= 85-(45-5)= 40+6+20=
30
68
90
①56+39=
②74-25=
③87-28-36=
④46+34-27=
①52-9=
②5+66=
③100-27=
④68+17=
⑤70-35=
⑥85+15=
82-18=
68+19=
56-28=
15-98 7+917 9+918
9+413 16-95 8+916
读作:
写作:
526﹣198= 0.32×2.5= n×n= kg:240g=
24×+= 2.6+1.98= -= 1.6÷25%=
÷= ×÷×0=