1. 直接写出得数。
$720÷9=$ $90 - 49 =$ $50×3=$ $25×3×2=$
$330 + 80 =$ $630÷6=$ $120 - 30 =$ $203 - (43 - 29) =$
$80÷5=$ $60 - 28 =$ $720 - 40 =$ $25×6 + 19 =$
$21×8 =$ $250 + 98 =$ $56 + 39 =$ $720÷2×3 =$
$35×9 =$ $500÷2 =$ $16×5 =$ $(1340 - 600)÷2 =$
$420÷7 =$ $220÷4 =$ $820÷4 =$ $432÷(90 - 86) =$
$6×11 =$ $26×4 =$ $700÷5 =$ $256 - 58×2 =$
$560÷8 =$ $508×2 =$ $770×2 =$ $(656 - 256)×6 =$

1. 80 41 150 150 410 105 90 189 16 32 680 169 168 348 95 1080 315 250 80 370 60 55 205 108 66 104 140 140 70 1016 1540 2400

2. 用竖式计算，并验算。
$564 + 26 =$ $724 - 79 =$ $456 - 47 =$

2. 590 645 409 335 910 84 竖式及验算略

3. 在$◯$里填“$＞$”“$＜$”或“$=$”。
$732 - 495◯300$ $236 + 69◯69 + 236$
$755 - 48◯755 - 28$ $126 + 326◯346 + 106$
$107 + 108◯107 + 99$ $430 - 69◯430 - 96$
$846 - (126 + 283)◯846 - 283 - 126$

3. ＜ = ＜ = ＞ ＞ =