×16= × = ×2.7= ×3.5=
44× = × = × = × =
× ÷7 15× ÷
42÷ 42÷ ÷ ÷
×4= - = × =
3.6× = ÷ = ÷ =
24÷ = ×1.8= + × =
× = ÷ = ( - )×16=
× =
× =( )