一、口算。
$335 - 245 = $
$80 × 55 = $
$99 ÷ 11 = $
$702 ÷ 3 = $
$120 × 80 = $
$209 × 4 = $
$35 + 47 = $
$46 × 3 = $
$335 - 245 = $
90
$402 + 57 = $459
$840 ÷ 20 = $42
$80 × 55 = $
4400
$43 × 2 = $86
$75 ÷ 5 = $15
$99 ÷ 11 = $
9
$420 ÷ 14 = $30
$100 - 47 = $53
$702 ÷ 3 = $
234
$616 ÷ 8 = $77
$700 ÷ 14 = $50
$120 × 80 = $
9600
$15 × 30 = $450
$41 × 20 = $820
$209 × 4 = $
836
$630 ÷ 10 = $63
$75 + 750 = $825
$35 + 47 = $
82
$860 ÷ 20 = $43
$360 ÷ 18 = $20
$46 × 3 = $
138
$224 × 40 = $8960
$11 × 600 = $6600
答案
90 459 42
4400 86 15
9 30 53
234 77 50
9600 450 820
836 63 825
82 43 20
138 8960 6600
4400 86 15
9 30 53
234 77 50
9600 450 820
836 63 825
82 43 20
138 8960 6600
二、计算下面组合图形的面积。

答案
48×8+48×6÷2=528(dm²)
(14+26)×12÷2-14×6÷2=198(m²)
(14+26)×12÷2-14×6÷2=198(m²)
登录