⑴3.48+6.52=
⑵3.6÷0.04=
⑶1.6×5=
⑷0.9-0.26=
⑸
⑹×15=
⑺
⑻
⑼25%×16=
⑽3÷15=
⑾70×13=
⑿21÷1000=
⒀2-=
⒁0.48÷=
⒂a-0.2a=
⒃
⒄2π=
⒅72=
⒆63.2÷6.9≈
⒇802-205≈