13.6+6.44= 1- = 0.48×2.5= 3.15÷3= + =
2.54-0.4= 5.3+7= 9÷14= 0.32= 1.25×0.8÷1.25×0.8=
4.1-3.8= 4+0.78= 14.6-0.4= 1.3+8.6= 0.8-0.55=
4-0.04= 1-0.03= 3.5+3.5= 0.8-0.5= 0.78+2.2=
+ = 1- = × = + + =
×21= 0.375÷ = 0÷ = 32-23=
=
①3.6﹣2.8+7.4﹣7.2
②1.25×1.6×25
③÷4
④÷[(﹣)×]