1 5 3 1
①260×74=
②308×64=
③680×50=
④297×39=
⑤789×43=
⑥607×36=
①2.95+0.5= ②98﹣25= ③18×0.3= ④609÷3= ⑤0.3×0.4=
⑥26+0.2= ⑦×= ⑧5﹣= ⑨+= ⑩6÷=