78-26= 33+58= 67+20= 37-19= 8×8=
80-7×9= 37+(85-26)= 25+5×6= 100-(43-27)=
①58+29=
②90-54=
③64-44=
④55+30=
⑤46+(25-17)=
⑥37+13-40=
71-34= 24÷8= 59+14= 18÷6=
0×9= 81-44= 61+29= 4×10=