① 直接写出得数。
$9 ÷ 0.3 =$
$42 ÷ 4 =$
$0.35 ÷ 0.7 =$
$7.5 × 0.4 =$
$3.6 ÷ 6 =$
$4.3 × 5 =$
$0.1 - 0.05 =$
$0.36 + 0.4 =$
$3.5 × 0.6 × 2 =$
$0.19 - 0.19 ÷ 1.9 =$
$9 ÷ 0.3 =$
$42 ÷ 4 =$
$0.35 ÷ 0.7 =$
$7.5 × 0.4 =$
$3.6 ÷ 6 =$
$4.3 × 5 =$
$0.1 - 0.05 =$
$0.36 + 0.4 =$
$3.5 × 0.6 × 2 =$
$0.19 - 0.19 ÷ 1.9 =$
答案
(横排)30,10.5,0.5,3,0.6,21.5,0.05,0.76,4.2,0.09。
2 用竖式计算。
0.25 × 0.68 =
7.2 ÷ 0.99 ≈
(结果用“四舍五入法”精确到千分位)
0.25 × 0.68 =
7.2 ÷ 0.99 ≈
(结果用“四舍五入法”精确到千分位)
答案
0.17,7.273。
3 计算,能简便的用简便方法计算。
$0.545 ÷ [(15.5 - 10.05) × 0.2]$
$0.99 × 0.58$
$12.5 × 4.8 × 0.25$
$3.6 × 45 + 5.4 × 36 + 3.6$
$0.545 ÷ [(15.5 - 10.05) × 0.2]$
$0.99 × 0.58$
$12.5 × 4.8 × 0.25$
$3.6 × 45 + 5.4 × 36 + 3.6$
答案
(横排)0.5,0.5742,15,360。
登录