①45+37=
②73-45=
③18+27+30=
④12+79-36=
⑤76-35-28=
⑥80-(34+15)=
36+5= 72-7= 78+6= 46+6-30=
82+9= 4×2= 26+40= 47+20-8=
3×2= 93-13= 68+9= 38+4+7 =
36+8= 70+30= 2×2= 67-40+21 =
①8×7
②5×6
③4×9
④3×8
①47+39=
②26+41=
③77-29=
④98-24=
⑤17+28=
⑥80-12=
算式:
1800÷45= 6.4+9.6= 0.875﹣= 12×98≈
56×= 1.6×125%= ×24÷= 9+11+13+……+41=