①63×(+-)
②×11+
③÷-×(1+)
④(-)×25×24
⑤×33+54÷+0.375
⑥×2021
写作:
读作:
500-213= 10÷10%= 0.25+2.83= 1.25×0.8= 3.7-3.7÷3.7=
92-33= + = × = 9÷ = ( - )×20=