1.35 0.25 0.8
①1042-384÷16×13
②4.56+40.5÷3
③( )
④0.8×3.6-0.8×0.6
⑤6.4×9+6.4
⑥( ) ( )
①(++)×30
②7.2×99+7.2
③(+)×7+
④×153﹣0.6×53
⑤×+÷5+
⑥×[﹣(﹣)]
400÷80= 7.7+2.3= 4.2÷0.6= 1﹣0.91=
0.04×1000= 10÷1.25×9= 24×0.25= 23﹣1=
+= ×20=