24×25=×100 1200÷25=÷100
①(20+52)÷3﹣18
②(1.5﹣0.6)×(2﹣1.8)
③()×48
④2023×0.2+2023×80%
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=