一、口算。
$90 + 70 =$ $45×3 =$ $91 - 45 =$
$72÷3 =$ $96÷2 =$ $34×5 =$
$630÷9 =$ $40×80 =$ $160×4 =$
$108×3 =$ $90×11 =$ $430 - 50 =$
$390 + 540 =$ $309÷3 =$ $225×2 =$
$47×20 =$ $330×0 =$ $700÷5 =$
$120 - 38 =$ $105÷5 =$ $62×20 =$
$322×2 =$ $560÷4 =$ $43×50 =$

一、160 135 46
24 48 170
70 3200 640
324 990 380
930 103 450
940 0 140
82 21 1240
644 140 2150

二、计算下面各题。
$519 + 360÷4$ $436 - 36×8$ $(73 - 56)×92$
$45×12÷6$ $43×26 - 810$ $(124 + 226)÷7$

二、609 148 1564
90 308 50