直接写出得数.4.5﹣1.7= = 2.5×13×4= 4×÷4×=8.2÷0.1= ×= 4.5﹣= 1+÷+1=
(562×397)÷(281×397)= .
29×12+29×13+29×25+29×10= .
14.8×6.3﹣6.3×6.5+8.3×3.7= .
3.2+4.57= 407+11.3+5.3= 0.25×(44﹣8)= 0.9+99×0.9= 6.38×8×125%= 10÷0.1﹣0.1÷10= 7.9×4+2.7= 4﹣4×0.6= .
能简算的要简算×7+÷ (+)×56 3÷﹣÷3÷[(+)×] (5﹣﹣)÷.