一、口算。
$430 + 36 =$ $17×40 =$ $80 + 500 =$
$200×11 =$ $600÷4 =$ $600×7 =$
$720÷30 =$ $420×5 =$ $840÷3 =$
$85 - 36 =$ $63 + 17 =$ $93 - 26 =$
$540÷6 =$ $30×15 =$ $900÷9 =$
$60 + 104 =$ $71 - 29 =$ $32×50 =$
$88÷22 =$ $140×6 =$ $240÷80 =$
$240×40 =$ $550÷11 =$ $480 - 80 =$
$77÷7 =$ $99 - 38 =$ $37 + 68 =$
$150×2 =$ $18×5 =$ $160÷4 =$

周二
一、466 680 580
2200 150 4200
24 2100 280
49 80 67
90 450 100
164 42 1600
4 840 3
9600 50 400
11 61 105
300 90 40

二、用简便方法计算。
$46 + 273 + 254$ $75 + 124 + 76$ $135 + 208 + 65 + 92$

二、573 275 500