45分钟=小时
×2= ÷5= 7.8× = × ×0=
÷ = ×1.4= 10÷0.1= ( - )÷ =
3.14×52= -0.6= + ×7= x ÷ ÷ =
①2.95+0.5= ②98﹣25= ③18×0.3= ④609÷3= ⑤0.3×0.4=
⑥26+0.2= ⑦×= ⑧5﹣= ⑨+= ⑩6÷=